polish demo UI and upgrade tailwindcss

Author: wwayne

demo/src/App/index.scss

@@ -1,4 +1,3 @@
-// App
 #app {
   min-height: 100vh;
   background: #000;

demo/src/App/index.tsx

@@ -81,7 +81,7 @@ class App extends Component {
             updateShape={this.updateShape.bind(this)}
             download={this.download.bind(this)} />
           <input
-            className="w-64 h-10 p-2 rounded mt-10 inputField text-center outline-none"
+            className="inputField w-64 h-10 p-2 rounded-full mt-10 text-center outline-none"
             placeholder="input name or email ..."
             onKeyUp={this.onInputKeyUp.bind(this)} />
         </main>

package.json

@@ -62,7 +62,7 @@
     "sass-loader": "^10.2.0",
     "standard-version": "^9.3.1",
     "style-loader": "^1.0.0",
-    "tailwindcss": "^2.2.7",
+    "tailwindcss": "2",
     "terser-webpack-plugin": "^2.1.2",
     "ts-jest": "^27.0.4",
     "tsconfig-paths-webpack-plugin": "^3.5.1",