ci: test github actions

.github/workflows/test-dts.yml

@@ -0,0 +1,16 @@
+name: 'test-dts'
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - master
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: bahmutov/npm-install@v1
+      - name: test dts
+        run: yarn test-dts

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: 'test'
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - master
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: bahmutov/npm-install@v1
+      - name: test dts
+        run: yarn test --ci