Add npm package and github actions

.github/workflows/lint.yml

@@ -0,0 +1,17 @@
+name: lint
+on:
+  push:
+    branches:
+      - '*'
+      - '!master'
+jobs:
+  eslint:
+    name: eslint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 10
+      - run: yarn
+      - run: yarn style:check

.github/workflows/npm-publish.yml

@@ -0,0 +1,18 @@
+name: npm-publish
+on:
+  push:
+    branches:
+      - master
+jobs:
+  npm-publish:
+    name: npm-publish
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/setup-node@v1
+        with:
+          node-version: 10
+      - run: yarn
+      - uses: JS-DevTools/npm-publish@v1
+        with:
+          token: ${{ secrets.NPM_AUTH_TOKEN }}