build: update package.json and add gulp dependency

Author: ProfBramble

package.json

@@ -7,9 +7,11 @@
   "module": "lib/index.js",
   "types": "lib/index.d.ts",
   "scripts": {
+    "gulp": "gulp",
     "increase-memory-limit": "cross-env LIMIT=8096 increase-memory-limit",
     "storybook": "start-storybook -p 9001 -c .storybook",
     "build-storybook": "export NODE_ENV='production' && build-storybook -c .storybook -o dist",
+    "build": "npm run build-ts && npm run gulp",
     "compile": "rm -rf lib && npm run build-ts && npm run build-css",
     "build-ts": "tsc -p tsconfig.build.json",
     "build-css": "node-sass ./src/styles/index.scss ./lib/index.css",
@@ -110,6 +112,9 @@
     "eslint-plugin-sort-requires": "^2.1.0",
     "eslint-plugin-standard": "^4.0.0",
     "file-loader": "^6.0.0",
+    "gulp": "^4.0.2",
+    "gulp-eslint": "^6.0.0",
+    "gulp-sass": "^4.1.0",
     "husky": "^1.2.0",
     "increase-memory-limit": "^1.0.7",
     "jest": "^24.9.0",
@@ -125,6 +130,7 @@
     "storybook-react-router": "^1.0.8",
     "storybook-readme": "^5.0.5",
     "style-loader": "^0.23.1",
+    "through2": "^4.0.2",
     "typescript": "^3.5.3",
     "url-loader": "^4.1.0"
   },
@@ -143,4 +149,4 @@
     "react-router": "3.0.4",
     "showdown": "^1.9.0"
   }
-}
+}