Bumped NPM dependency versions

Author: dmhendricks

README.md

@@ -75,6 +75,7 @@ See the [Getting Started](https://github.com/dmhendricks/wordpress-base-plugin/w
 
 * Refactor the Plugin and Loader classes
 * Add plugin uninstall hook
+* Add support for Gulp 4.0
 * Add [phpdotenv](https://github.com/etelford/phpdotenv) support
 * Switch to npm and WebPack for frontend dependency management
 
@@ -92,6 +93,7 @@ Release changes are noted on the [Releases](https://github.com/dmhendricks/wordp
 * Updated JS injection to use wordpress-toolkit [ScriptObject](https://github.com/dmhendricks/wordpress-toolkit/wiki/ScriptObject)
 * Added Customizer options example (via [inc2734/wp-customizer-framework](https://github.com/inc2734/wp-customizer-framework))
 * Added various Carbon Fields custom CSS classes
+* Bumped NPM dependency versions
 
 ## Screenshot
 

package.json

@@ -12,23 +12,23 @@
     "zip": "zip -q -r ../$npm_package_name.zip * -x 'node_modules/*' '.git*' './src/*' './.*' './package*.*' './composer.*' './*.md' './*.bak' './bower.json' './gulpfile.js' "
   },
   "devDependencies": {
-    "del": "^3.0",
     "gulp": "^3.9.1",
+    "gulp-sass": "^3.1.0",
+    "gulp-uglify": "^3.0.0",
+    "gulp-uglifycss": "^1.0.9",
     "gulp-autoprefixer": "^3.1.0",
     "gulp-batch-replace": "*",
-    "gulp-concat": "^2.5.2",
-    "gulp-filter": "^4.0.0",
-    "gulp-line-ending-corrector": "^1.0.1",
+    "gulp-concat": "^2.6.1",
+    "gulp-filter": "^5.1.0",
+    "gulp-line-ending-corrector": "^1.0.2",
     "gulp-merge-media-queries": "^0.2.1",
-    "gulp-notify": "^2.2.0",
+    "gulp-notify": "^3.1.0",
     "gulp-rename": "^1.2.0",
-    "gulp-sass": "^2.2.0",
     "gulp-simple-rename": "^0.1.3",
     "gulp-sourcemaps": "^1.5.2",
-    "gulp-uglify": "^1.5.3",
-    "gulp-uglifycss": "^1.0.6",
     "vinyl-paths": "^2.1.0",
-    "wp-pot-cli": "^1.0"
+    "wp-pot-cli": "^1.0",
+    "del": "^3.0"
   },
   "repository": {
     "type": "git",