Update dependency gulp-sourcemaps

Unpin `gulp-sourcemaps` from `1.6.0` and update it to `^2.2.1`.

This version was pinned because of a bug introduced in `v1.7.0` (PR
 #153, issue #230). The bug was resolved in `v1.7.2` (PR #235)

See:
- https://github.com/floridoo/gulp-sourcemaps/issues/230
- https://github.com/floridoo/gulp-sourcemaps/pull/153
- https://github.com/floridoo/gulp-sourcemaps/pull/235

diff --git a/package.json b/package.json
index aab7e451ed455a60f25ea8bbc6e0ba8f1341825a..47b81c6d9de4106df8ab607ed8ad06e21ecf1854 100644 (file)
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "gulp-ruby-sass": "^2.0.6",
     "gulp-sass": "^2.1.0",
     "gulp-sass-lint": "^1.3.2",
-    "gulp-sourcemaps": "1.6.0",
+    "gulp-sourcemaps": "^2.2.1",
     "gulp-uglify": "^2.0.0",
     "gulp-zip": "^3.2.0",
     "inquirer": "^1.2.3",