Update dependencies

gulpfile.js

@@ -12,7 +12,7 @@ var coffee = require('gulp-coffee');
 
 // Compile all the Less.
 gulp.task('less', function () {
-    gulp.src(['./src/less/*.less'])
+    return gulp.src(['./src/less/*.less'])
         .pipe(less())
         .pipe(prefix(
             "last 1 version", "> 1%", "ie 8", "ie 7"
@@ -23,7 +23,7 @@ gulp.task('less', function () {
 
 // Compile all the CoffeeScript.
 gulp.task('coffee', function () {
-    gulp.src(['./src/coffee/*.coffee'])
+    return gulp.src(['./src/coffee/*.coffee'])
         .pipe(coffee())
         .pipe(gulp.dest('./web/js'));
 });
@@ -39,4 +39,4 @@ gulp.task('watch', function() {
     });
 });
 
-gulp.task('default', ['less', 'coffee']);
+gulp.task('default', gulp.series('less', 'coffee'));

package.json

@@ -22,12 +22,12 @@
   },
   "homepage": "https://github.com/lambdacasserole/avogadrio",
   "devDependencies": {
-    "bower": "~1.4.1",
-    "es6-promise": "^3.2.1",
-    "gulp": "^3.8.8",
-    "gulp-autoprefixer": "^3.1.0",
-    "gulp-coffee": "^2.2.0",
-    "gulp-less": "^1.3.6",
+    "bower": "^1.8.8",
+    "es6-promise": "^4.2.8",
+    "gulp": "^4.0.2",
+    "gulp-autoprefixer": "^7.0.1",
+    "gulp-coffee": "^3.0.3",
+    "gulp-less": "^4.0.1",
     "gulp-minify-css": "^1.2.4"
   }
 }