use require keyword and add testw to gulp

Signed-off-by: Jakub Sokołowski <jakub@status.im>

gulpfile.js

@@ -20,7 +20,19 @@ gulp.task('clean', () =>
 
 gulp.task('test', () =>
   gulp.src('test/**/*.js', {read: false})
-    .pipe(mocha({reporter: 'list', compilers: '@babel/register'}))
+    .pipe(mocha({
+      reporter: 'list',
+      require: '@babel/register',
+    }))
+)
+
+gulp.task('testw', () =>
+  gulp.src('test/**/*.js', {read: false})
+    .pipe(mocha({
+      reporter: 'list',
+      require: '@babel/register',
+      watch: true,
+    }))
 )
 
 gulp.task('build', () =>

package.json

@@ -43,7 +43,7 @@
   "scripts": {
     "start": "node server.js",
     "test": "gulp test",
-    "testw": "mocha --require @babel/register --watch",
+    "testw": "gulp testw",
     "cover": "nyc mocha",
     "devel": "gulp devel",
     "clean": "gulp clean",