chore: add CI, funding, husky, testing LIB

Author: mdevils

.github/FUNDING.yml

@@ -0,0 +1,2 @@
+github: [mdevils]
+tidelift: "npm/css-selector-parser"

.github/workflows/build.yml

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+name: build
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [16.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: npm ci --prefer-offline --no-audit --no-update-notifier
+      - run: npm run lint
+      - run: npm run test
+      - run: npm run build
+      - run: npm run test:lib