github: add CI for pull requests

and hacks to get tests working

.github/workflows/test-pull-request.yml

@@ -0,0 +1,35 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: CI Tests
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Get yarn cache directory path
+      id: yarn-cache-dir-path
+      run: echo "::set-output name=dir::$(yarn cache dir)"
+    - uses: actions/cache@v1
+      id: yarn-cache
+      with:
+        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-yarn-
+    - name: Run yarn install
+      run: |
+        echo "//npm.pkg.github.com/:_authToken=$TOKEN" >> .npmrc
+        yarn install
+      env:
+        TOKEN: ${{ secrets.privateToken }}
+    - run: yarn test
+    - run: yarn build
+      if: ${{ success() }}