Modernize sass and add Github action to auto-publish (#24)

* upgrade sass syntax

* add github action to publish package to npm on release

.gitattributes

@@ -0,0 +1,3 @@
+# Handle line endings automatically for files detected as text
+# and leave all files detected as binary untouched.
+* text=auto

.github/workflows/publsih.yml

@@ -0,0 +1,20 @@
+name: Publish NPM Package
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v2
+        with:
+          node-version: '16.x'
+          registry-url: 'https://registry.npmjs.org'
+
+      - uses: JS-DevTools/npm-publish@v1
+        with:
+          token: ${{ secrets.NPM_TOKEN }}

.gitignore

@@ -1,2 +1,2 @@
-!dist
+dist
 node_modules