chore(showcase): adjust build

Author: nivekcode

package.json

@@ -15,12 +15,10 @@
     "build:lib": "ng build ng-sortgrid",
     "build:demo": "ng build ng-sortgrid-demo --base-href='https://kreuzerk.github.io/ng-sortgrid/'",
     "publish": "npm run publish:lib",
-    "publish:demo": "npm run angular-cli-ghpages --dir=./dist/ng-sortgrid-demo",
-    "publish:lib": "cd dist/ng-sortgrid && npm run semantic-release",
+    "publish:demo": "npx angular-cli-ghpages --dir=./dist/ng-sortgrid-demo",
+    "publish:lib": "cd dist/ng-sortgrid && npx semantic-release",
     "lint": "ng lint",
-    "e2e": "ng e2e",
-    "angular-cli-ghpages": "angular-cli-ghpages",
-    "semantic-release": "semantic-release"
+    "e2e": "ng e2e"
   },
   "private": true,
   "dependencies": {
@@ -47,7 +45,6 @@
     "@types/jasmine": "~2.8.8",
     "@types/jasminewd2": "~2.0.3",
     "@types/node": "~8.9.4",
-    "angular-cli-ghpages": "^0.5.3",
     "codecov": "^3.3.0",
     "codelyzer": "~4.5.0",
     "husky": "^1.3.1",
@@ -62,7 +59,6 @@
     "ng-packagr": "^4.2.0",
     "prettier": "^1.16.4",
     "protractor": "~5.4.0",
-    "semantic-release": "^15.13.3",
     "ts-node": "~7.0.0",
     "tsickle": ">=0.34.0",
     "tslib": "^1.9.0",