fix: make MIME type check case-insensitive

fix: fix es module compatibility and close #48

feat: Add a module entry to package.json (#47)

feat: add TypeScript type definitions (#40)

ci: ditch travis in favor of github actions

fix: drop a RegExp in favour of an .endsWith (#27)

fix: Upgrade core-js to 2.5 (#26)

build: Move semantic-release to CI (#25)

* build: Move semantic-release to CI

* chore: Add package-lock.json

* build: Remove some old Travis stuff

* build: Use Node 8 explicetly

build(npm): Switched to semantic-release

1.0.3