Switched from CircleCI to Github Actions (#22)

Author: Josh Goldberg

.circleci/config.yml

@@ -0,0 +1,17 @@
+name: Publish to NPM
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: Codecademy/run-on-yarn@v1
+        with:
+          command: compile
+      - uses: JS-DevTools/npm-publish@v1
+        with:
+          token: ${{ secrets.NPM_TOKEN }}
+
+on:
+  push:
+    branches:
+      - main

.github/workflows/publish.yml

@@ -0,0 +1,16 @@
+name: Push CI
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: Codecademy/run-on-yarn@v1
+        with:
+          command: ${{ matrix.command }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        command: ["eslint", "prettier", "test:ci", "tsc"]
+
+on: push