Bump extend from 2.0.1 to 3.0.2

Bumps [extend](https://github.com/justmoon/node-extend) from 2.0.1 to 3.0.2.
- [Release notes](https://github.com/justmoon/node-extend/releases)
- [Changelog](https://github.com/justmoon/node-extend/blob/master/CHANGELOG.md)
- [Commits](https://github.com/justmoon/node-extend/compare/v2.0.1...v3.0.2)
Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -50,7 +50,7 @@
     "eslint-plugin-mocha": "^4.8.0",
     "exorcist": "^0.4.0",
     "express": "^4.14.1",
-    "extend": "^2.0.0",
+    "extend": "^3.0.2",
     "gulp": "^4.0.0",
     "gulp-batch": "^1.0.5",
     "gulp-changed": "^3.2.0",

yarn.lock

@@ -3225,12 +3225,7 @@ extend@^1.2.1:
   resolved "https://registry.yarnpkg.com/extend/-/extend-1.3.0.tgz#d1516fb0ff5624d2ebf9123ea1dac5a1994004f8"
   integrity sha1-0VFvsP9WJNLr+RI+odrFoZlABPg=
 
-extend@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/extend/-/extend-2.0.1.tgz#1ee8010689e7395ff9448241c98652bc759a8260"
-  integrity sha1-HugBBonnOV/5RIJByYZSvHWagmA=
-
-extend@^3.0.0, extend@~3.0.0, extend@~3.0.2:
+extend@^3.0.0, extend@^3.0.2, extend@~3.0.0, extend@~3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
   integrity sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==