Move some gulp deps to dev rather than prod

package.json

@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "repository": "https://github.com/nottinghamtec/PyRIGS",
   "author": "Tom Price",
-  "license": "MIT",
+  "license": "Custom",
   "dependencies": {
     "@forevolve/bootstrap-dark": "^1.0.0-alpha.1075",
     "@fortawesome/fontawesome-free": "^5.13.1",
@@ -16,8 +16,6 @@
     "dark-mode-switch": "^1.0.0",
     "flatpickr": "^4.6.6",
     "fullcalendar": "^5.3.2",
-    "gulp-if": "^3.0.0",
-    "gulp-rename": "^2.0.0",
     "jquery": "^3.5.1",
     "jquery-ui-dist": "^1.12.1",
     "konami": "^1.6.2",
@@ -30,7 +28,9 @@
     "gulp": "^4.0.2",
     "gulp-clean-css": "^4.3.0",
     "gulp-flatten": "^0.4.0",
+    "gulp-if": "^3.0.0",
     "gulp-postcss": "^8.0.0",
+    "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.1.0",
     "gulp-sourcemaps": "^2.6.5",
     "gulp-terser": "^1.2.0",