fix(tests): CI fixes

.travis.yml

@@ -1,7 +1,7 @@
 dist: trusty
 sudo: required
 language: node_js
-cache: yarn
+cache: npm
 git:
  depth: 5
 node_js:
@@ -10,10 +10,10 @@ node_js:
  - "6"
 before_install:
  - sudo sysctl fs.inotify.max_user_watches=524288
- - yarn global add greenkeeper-lockfile@1 rimraf
+ - npm i -g greenkeeper-lockfile@1 rimraf
 before_script:
  # - greenkeeper-lockfile-update
 script:
- - yarn test
+ - npm test
 after_script:
  # - greenkeeper-lockfile-upload

appveyor.yml

@@ -23,16 +23,15 @@ install:
  - ps: Install-Product node $env:nodejs_version
  - set CI=true
  - set AppVeyor=true
- - yarn global add rimraf
- - yarn
+ - npm i -g rimraf
+ - npm ci || npm install
 
 build: off
 
 cache:
- - "%LOCALAPPDATA%\\Yarn"
+ - "%LOCALAPPDATA%\\npm-cache"
 
 test_script:
  - node --version
  - npm --version
- - yarn --version
- - cmd: yarn test
+ - cmd: npm test

jest.config.js

@@ -8,6 +8,7 @@ module.exports = {
  coverageDirectory: 'test_coverage_dir',
  collectCoverageFrom: ['src/**/*.tsx', 'src/**/*.ts'],
  moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json'],
+ testEnvironment: 'node',
  globals: {
  'ts-jest': {
  tsConfig: 'tsconfig.base.json',