docs(demos): remove deprecated tilde syntax from scss imports

Author: mattlewis92

projects/demos/app/demo-modules/dark-theme/sources.ts

@@ -19,14 +19,14 @@ export const sources = [
       raw: {
         default: require('!!raw-loader!./styles.scss').default.replace(
           '../../../../angular-calendar/src/angular-calendar.scss',
-          '~angular-calendar/scss/angular-calendar.scss'
+          'angular-calendar/scss/angular-calendar.scss'
         ),
       },
       highlighted: {
         default:
           require('!!raw-loader!highlightjs-loader?lang=scss!./styles.scss').default.replace(
             '../../../../angular-calendar/src/angular-calendar.scss',
-            '~angular-calendar/scss/angular-calendar.scss'
+            'angular-calendar/scss/angular-calendar.scss'
           ),
       },
     },

projects/demos/styles.scss

@@ -1,7 +1,7 @@
-@import '~bootstrap/scss/bootstrap';
-@import '~@fortawesome/fontawesome-free/css/all.css';
-@import '~highlight.js/styles/github.css';
-@import '~flatpickr/dist/flatpickr.css';
+@import 'bootstrap/scss/bootstrap';
+@import '@fortawesome/fontawesome-free/css/all.css';
+@import 'highlight.js/styles/github.css';
+@import 'flatpickr/dist/flatpickr.css';
 @import '../angular-calendar/src/angular-calendar';
 
 @media (min-width: 768px) {