Upgrade lodash to fix a security issue (#776)

Co-authored-by: Douglas <douglas.dowie@skyscanner.net>

Author: Douglas Dowie

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Gulp Sass Changelog
 
+## v4.1.1
+**October 15, 2020**
+* Upgrade lodash to address a security issue (Prototype Pollution).
+
 ## v4.1.0
 **April 23, 2020**
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "gulp-sass",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "description": "Gulp plugin for sass",
   "main": "index.js",
   "engines": {
@@ -25,7 +25,7 @@
   },
   "dependencies": {
     "chalk": "^2.3.0",
-    "lodash": "^4.17.11",
+    "lodash": "^4.17.20",
     "node-sass": "^4.8.3",
     "plugin-error": "^1.0.1",
     "replace-ext": "^1.0.0",