chore: add automated releases (#1124)

Adds release-please github action to create gated releases and a release issue that tracks all issues that will be in a release.

.github/workflows/main.yml

@@ -53,6 +53,7 @@ jobs:
       - uses: ipfs/aegir/actions/cache-node-modules@master
       - run: npm run test:node -- --cov --bail
       - uses: codecov/codecov-action@v1
+
   test-chrome:
     needs: check
     runs-on: ubuntu-latest
@@ -63,6 +64,7 @@ jobs:
           node-version: lts/*
       - uses: ipfs/aegir/actions/cache-node-modules@master
       - run: npm run test:browser -- -t browser -t webworker --bail
+
   test-firefox:
     needs: check
     runs-on: ubuntu-latest
@@ -73,6 +75,7 @@ jobs:
           node-version: lts/*
       - uses: ipfs/aegir/actions/cache-node-modules@master
       - run: npm run test:browser -- -t browser -t webworker --bail -- --browser firefox
+
   test-ts:
     needs: check
     runs-on: ubuntu-latest
@@ -83,6 +86,7 @@ jobs:
           node-version: lts/*
       - uses: ipfs/aegir/actions/cache-node-modules@master
       - run: npm run test:ts
+
   test-interop:
     needs: check
     runs-on: ubuntu-latest
@@ -93,3 +97,28 @@ jobs:
           node-version: lts/*
       - uses: ipfs/aegir/actions/cache-node-modules@master
       - run: npm run test:interop -- --bail -- --exit
+
+  release:
+    runs-on: ubuntu-latest
+    needs: [test-node, test-chrome, test-firefox, test-ts, test-interop]
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    steps:
+      - uses: GoogleCloudPlatform/release-please-action@v2
+        id: release
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          release-type: node
+          bump-minor-pre-major: true
+      - uses: actions/checkout@v2
+        if: ${{ steps.release.outputs.release_created }}
+      - uses: actions/setup-node@v2
+        with:
+          node-version: lts/*
+          registry-url: 'https://registry.npmjs.org'
+        if: ${{ steps.release.outputs.release_created }}
+      - uses: bahmutov/npm-install@v1
+        if: ${{ steps.release.outputs.release_created }}
+      - run: npm publish
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}
+        if: ${{ steps.release.outputs.release_created }}