could remove unnecessary files from npm packaging

[pietrop]

Noticed this while working on slate-transcript-editor. It's worth considering adding some more things to .npmignore In my current fork of react-transcript-editor if I do npm run publish:dry:run I get

npm publish --dry-run

npm notice 
npm notice 📦  @pietrop/[email protected]
npm notice === Tarball Contents === 
npm notice 52B     .eslintignore                                                      
npm notice 1.9kB   .eslintrc                                                          
npm notice 12B     .nvmrc                                                             
npm notice 665B    .stylelintrc                                                       
npm notice 405.4kB docs/qa/images/timed-text-editor-double-click-on-word.gif          
npm notice 214B    .storybook/addons.js                                               
npm notice 605B    babel.config.js                                                    
npm notice 831B    .storybook/config.js                                               
npm notice 1.3MB   dist/exportAdapter.js                                              
npm notice 1.5kB   dist/groupWordsInParagraphsBySpeakersDPE.js                        
npm notice 1.9MB   dist/index.js                                                      
npm notice 60.7kB  dist/KeyboardShortcuts.js                                          
npm notice 243.1kB dist/MediaPlayer.js                                                
npm notice 22.5kB  dist/PlaybackRate.js                                               
npm notice 75.1kB  dist/PlayerControls.js                                             
npm notice 81.7kB  dist/ProgressBar.js                                                
npm notice 12.6kB  dist/Select.js                                                     
npm notice 71.6kB  dist/Settings.js                                                   
npm notice 10.4kB  dist/sttJsonAdapter.js                                             
npm notice 218B    __mocks__/styleMock.js                                             
npm notice 2.3kB   dist/timecodeConverter.js                                          
npm notice 1.7MB   dist/TimedTextEditor.js                                            
npm notice 1.9MB   dist/TranscriptEditor.js                                           
npm notice 11.0kB  dist/VideoPlayer.js                                                
npm notice 4.2kB   dist/package.json                                                  
npm notice 4.2kB   package.json                                                       
npm notice 84.3kB  docs/notes/examples/subtitalizer-entities-range-example.json       
npm notice 3.3MB   dist/exportAdapter.js.map                                          
npm notice 9.1kB   dist/groupWordsInParagraphsBySpeakersDPE.js.map                    
npm notice 6.5MB   dist/index.js.map                                                  
npm notice 876.1kB dist/KeyboardShortcuts.js.map                                      
npm notice 1.7MB   dist/MediaPlayer.js.map                                            
npm notice 56.4kB  dist/PlaybackRate.js.map                                           
npm notice 894.0kB dist/PlayerControls.js.map                                         
npm notice 113.8kB dist/ProgressBar.js.map                                            
npm notice 41.3kB  dist/Select.js.map                                                 
npm notice 896.6kB dist/Settings.js.map                                               
npm notice 56.6kB  dist/sttJsonAdapter.js.map                                         
npm notice 11.5kB  dist/timecodeConverter.js.map                                      
npm notice 5.4MB   dist/TimedTextEditor.js.map                                        
npm notice 6.5MB   dist/TranscriptEditor.js.map                                       
npm notice 40.3kB  dist/VideoPlayer.js.map                                            
npm notice 2.4kB   docs/qa/0-component-interface.md                                   
npm notice 2.9kB   docs/qa/1-player-controls.md                                       
npm notice 1.5kB   docs/qa/2-timed-text-editor.md                                     
npm notice 3.1kB   docs/adr/2018-01-24-frequency-of-local-storage-save.md             
npm notice 2.7kB   docs/notes/draftjs/2018-10-01-draftjs-1-basics.md                  
npm notice 3.1kB   docs/adr/2018-10-01-timed-editor-choice.md                         
npm notice 2.3kB   docs/adr/2018-10-02-component-fonts.md                             
npm notice 2.8kB   docs/adr/2018-10-02-css-setup.md                                   
npm notice 4.4kB   docs/notes/draftjs/2018-10-02-drafjs-2-entity-range.md             
npm notice 912B    docs/notes/2018-10-05-babel-setup.md                               
npm notice 3.8kB   docs/adr/2018-10-05-component-development-setup.md                 
npm notice 2.8kB   docs/adr/2018-10-05-components-comunication.md                     
npm notice 156B    docs/notes/draftjs/2018-10-05-draftjs-paragraph-block-formatting.md
npm notice 268B    docs/notes/2018-10-06-automated-testing.md                         
npm notice 183B    docs/notes/2018-10-06-babel-jest.md                                
npm notice 2.2kB   docs/notes/2018-10-06-refactoring-reduce-to-for.md                 
npm notice 1.8kB   docs/notes/2018-10-07-component-will-receive-props-deprecated.md   
npm notice 4.0kB   docs/notes/draftjs/2018-10-07-draftjs-3-play-word-on-click.md      
npm notice 8.9kB   docs/notes/draftjs/2018-10-07-draftjs-4-hlight-current-word.md     
npm notice 664B    docs/notes/draftjs/2018-10-08-draftjs-5-saving-current.md          
npm notice 8.0kB   docs/adr/2018-10-12-keyboard-shortcuts-in-react-notes.md           
npm notice 230B    docs/notes/2018-10-12-replace-timestamps-for-tests.md              
npm notice 450B    docs/notes/2018-10-16-locastorage.md                               
npm notice 1.4kB   docs/notes/draftjs/2018-10-20-draftjs-6-local-storage.md           
npm notice 1.5kB   docs/notes/2018-10-20-local-storage-draft-js.md                    
npm notice 1.6kB   docs/adr/2018-11-20-local-storage-save.md                          
npm notice 746B    docs/adr/2018-11-20-save-to-server.md                              
npm notice 13.4kB  docs/notes/2018-11-22-automated-testing-strategy.md                
npm notice 885B    docs/notes/2018-11-22-cra-eslint.md                                
npm notice 4.8kB   docs/notes/draftjs/2018-11-22-draftjs-7-speaker-info.md            
npm notice 202B    docs/notes/2018-11-28-travis-ci.md                                 
npm notice 1.6kB   docs/notes/2018-11-29-auto-pause-while-typing.md                   
npm notice 1.2kB   docs/notes/2018-11-29-git-cheat-sheet.md                           
npm notice 1.1kB   docs/notes/2018-11-29-scroll-sync.md                               
npm notice 3.8kB   docs/notes/2018-12-06-analytics-raise-events.md                    
npm notice 1.3kB   docs/adr/2018-12-06-analytics.md                                   
npm notice 2.9kB   docs/adr/2018-12-10-re-aligning-timed-text.md                      
npm notice 236B    docs/notes/draftjs/2018-12-11-multi-user-collaboration.md          
npm notice 1.1kB   docs/notes/2019-01-03-babel-7-cli-ignore-syntax.md                 
npm notice 17.8kB  docs/notes/2019-05-16-prevent-unnecessary-re-renders-in-react.md   
npm notice 656B    docs/notes/2019-07-31-npm-tags.md                                  
npm notice 698B    docs/notes/2020-03-13-entity-map.md                                
npm notice 4.4kB   docs/qa/3-settings.md                                              
npm notice 1.4kB   docs/qa/4-keyboard-shortcuts.md                                    
npm notice 1.5kB   docs/qa/5-analytics.md                                             
npm notice 6.7kB   docs/guides/adapters.md                                            
npm notice 2.2kB   docs/adr/ADR-Template.md                                           
npm notice 1.8kB   docs/guides/analytics.md                                           
npm notice 876B    .github/ISSUE_TEMPLATE/bug_report.md                               
npm notice 6.1kB   CODE_OF_CONDUCT.md                                                 
npm notice 3.3kB   CONTRIBUTING.md                                                    
npm notice 5.7kB   docs/guides/draftjs-blocks-entityrange-entitmap.md                 
npm notice 645B    .github/ISSUE_TEMPLATE/feature_request.md                          
npm notice 2.7kB   docs/features-list.md                                              
npm notice 1.1kB   LICENCE.md                                                         
npm notice 610B    .github/PULL_REQUEST_TEMPLATE.md                                   
npm notice 194B    .github/ISSUE_TEMPLATE/question.md                                 
npm notice 11.2kB  dist/README.md                                                     
npm notice 2.5kB   docs/qa/README.md                                                  
npm notice 12.2kB  README.md                                                          
npm notice 6.7kB   docs/guides/storybook-npm-setup.md                                 
npm notice 800.9kB docs/qa/images/picture-in-picture.png                              
npm notice 279.4kB docs/qa/images/player-controls-preview.png                         
npm notice 24.4kB  docs/qa/images/player-controls.png                                 
npm notice 66B     .storybook/styles/fonts.scss                                       
npm notice 186B    .storybook/styles/main.scss                                        
npm notice 246B    .travis.yml                                                        
npm notice === Tarball Details === 
npm notice name:          @pietrop/react-transcript-editor        
npm notice version:       1.3.4                                   
npm notice package size:  9.0 MB                                  
npm notice unpacked size: 35.6 MB                                 
npm notice shasum:        94f427b950858bab2e4e5daece1f7750e6ebd1cd
npm notice integrity:     sha512-xVI8tc4zqet+K[...]SfF/Ohny7CVPw==
npm notice total files:   109                                     
npm notice 
+ @pietrop/[email protected]

eg npmignore could include

src
demo
lib
packages
build
.babelrc
.babel.config.js
webpack.config.js

CONTRIBUTING.md  
CODE_OF_CONDUCT.md      
.github/
docs/
.out/
.gitbook.yaml 
*.sample.json
....