ci: create code coverage files using nyc and codecov (#22)

* ci: create code coverage files using nyc and codecov

* ci: delete paths in test.yml

.github/workflows/codecov.yml

@@ -0,0 +1,37 @@
+name: codecov
+
+on:
+  push:
+    branches: [main]
+    paths: ['src/**', 'tests/**']
+
+jobs:
+  codecov:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up checkout
+        uses: actions/checkout@v4
+
+      - name: Set up node
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: npm
+
+      - name: Set up cache
+        uses: actions/cache@v4
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
+
+      - name: Set up node_modules
+        run: npm ci
+
+      - name: Coverage
+        run: npm run coverage
+
+      - name: Upload results to codecov
+        uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/test.yml

@@ -3,11 +3,9 @@ name: test
 on:
   push:
     branches: [main]
-    paths: ['src/**', 'tests/**']
 
   pull_request:
     branches: [main]
-    paths: ['src/**', 'tests/**']
 
 jobs:
   test:

.gitignore

@@ -3,3 +3,7 @@
 
 # production
 /build
+
+# tests
+/.nyc_output
+/coverage