Repo standardization, using GH actions

Enforcing minimum node version of 12

Removing circleci config, adding GH actions

.github/workflows/build-lint-test.yml

@@ -0,0 +1,32 @@
+name: Build, Lint, and Test
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  build-lint-test:
+    name: Build, Lint, and Test
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        node-version: [12.x]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: yarn --frozen-lockfile --ignore-scripts
+      - run: yarn build
+      - run: yarn lint
+      - run: yarn test
+  all-jobs-pass:
+    name: All jobs pass
+    runs-on: ubuntu-20.04
+    needs:
+      - build-lint-test
+    steps:
+      - uses: actions/checkout@v2
+      - run: echo "Great success!"

.nvmrc

@@ -1 +1 @@
-v10
+v12

README.md

@@ -36,3 +36,9 @@ The project follows the same release process as the other libraries in the MetaM
 6. Once approved, the PR is squashed & merged
 7. The commit on the base branch is tagged
 8. The tag can be published as needed
+
+## Running tests
+
+```bash
+yarn test
+```

package.json

@@ -12,6 +12,9 @@
     "index.d.ts",
     "index.js.map"
   ],
+  "engines": {
+    "node": ">=12.0.0"
+  },
   "scripts": {
     "prepublishOnly": "yarn build",
     "build": "tsc --project .",