add github actions

Author: chaance

.github/workflows/release.yml

@@ -0,0 +1,37 @@
+name: release
+on:
+  release:
+    types: [published]
+
+jobs:
+  release:
+    if: github.repository == 'remix-run/react-router'
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Build
+        run: yarn build
+
+      - name: Test
+        run: yarn test & yarn size
+
+      - name: Publish
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: |
+          echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" > ~/.npmrc
+          node scripts/publish.js

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: test
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Build
+        run: yarn build
+
+      - name: Test
+        run: yarn test & yarn size