refactor: need to switch to the handlebars engine

Author: mfranzke

packages/core/package.json

@@ -4,7 +4,7 @@
   "version": "5.17.0",
   "main": "./src/index.js",
   "dependencies": {
-    "@pattern-lab/engine-mustache": "^5.16.4",
+    "@pattern-lab/engine-handlebars": "^5.16.4",
     "@pattern-lab/live-server": "^5.16.1",
     "chalk": "4.1.0",
     "chokidar": "3.5.1",

packages/development-edition-engine-handlebars/package.json

@@ -32,7 +32,6 @@
     "@pattern-lab/cli": "^5.17.0",
     "@pattern-lab/core": "^5.17.0",
     "@pattern-lab/engine-handlebars": "^5.16.4",
-    "@pattern-lab/engine-mustache": "^5.16.4",
     "@pattern-lab/plugin-tab": "^5.16.1",
     "@pattern-lab/starterkit-handlebars-demo": "^5.16.4",
     "@pattern-lab/uikit-workshop": "^5.17.0"

packages/uikit-workshop/package.json

@@ -44,7 +44,6 @@
     "@babel/runtime": "^7.13.10",
     "@pattern-lab/core": "^5.17.0",
     "@pattern-lab/engine-handlebars": "^5.16.4",
-    "@pattern-lab/engine-mustache": "^5.16.4",
     "@pattern-lab/uikit-polyfills": "^5.16.1",
     "@reach/visually-hidden": "^0.1.2",
     "@webcomponents/custom-elements": "^1.4.3",