Make stencil a dev dep

package.json

@@ -37,7 +37,9 @@
     "version": "npm run build"
   },
   "devDependencies": {
+    "@stencil/core": "^1.16.5",
     "@stencil/eslint-plugin": "^0.3.1",
+    "@stencil/sass": "^1.3.2",
     "@typescript-eslint/eslint-plugin": "^2.28.0",
     "@typescript-eslint/parser": "^2.28.0",
     "bluebird": "^3.7.2",
@@ -63,8 +65,6 @@
   "license": "MIT",
   "dependencies": {
     "@popperjs/core": "^2.1.1",
-    "@stencil/core": "^1.17.0-0",
-    "@stencil/sass": "^1.1.1",
     "color": "^3.1.2",
     "resize-observer-polyfill": "^1.5.1"
   },