Replace deprecated gulp-util and remove unused watchify (#6032)

* Replace deprecated gulp-util and remove unused watchify

* Remove logging

gulpfile.js

@@ -5,7 +5,6 @@ var replace = require('gulp-replace');
 var size = require('gulp-size');
 var streamify = require('gulp-streamify');
 var terser = require('gulp-terser');
-var util = require('gulp-util');
 var zip = require('gulp-zip');
 var exec = require('child_process').exec;
 var karma = require('karma');
@@ -22,10 +21,6 @@ var argv = yargs
 var srcDir = './src/';
 var outDir = './dist/';
 
-if (argv.verbose) {
-  util.log("Gulp running with options: " + JSON.stringify(argv, null, 2));
-}
-
 gulp.task('bower', bowerTask);
 gulp.task('build', buildTask);
 gulp.task('package', packageTask);

package.json

@@ -36,11 +36,10 @@
     "gulp-size": "^3.0.0",
     "gulp-streamify": "^1.0.2",
     "gulp-terser": "^1.1.6",
-    "gulp-util": "^3.0.0",
     "gulp-zip": "^4.2.0",
     "jasmine": "^3.3.0",
     "jasmine-core": "^3.3.0",
-    "karma": "^3.1.1",
+    "karma": "^4.0.0",
     "karma-chrome-launcher": "^2.2.0",
     "karma-coverage": "^1.1.1",
     "karma-firefox-launcher": "^1.0.1",
@@ -54,7 +53,6 @@
     "rollup-plugin-istanbul": "^2.0.1",
     "rollup-plugin-node-resolve": "^3.4.0",
     "rollup-plugin-terser": "^3.0.0",
-    "watchify": "^3.9.0",
     "yargs": "^12.0.5"
   },
   "dependencies": {