Bump extend from 3.0.1 to 3.0.2

Bumps [extend](https://github.com/justmoon/node-extend) from 3.0.1 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](justmoon/node-extend@v3.0.1...v3.0.2)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

yarn.lock

@@ -1986,8 +1986,8 @@ express@^4.13.3:
     vary "~1.1.1"
 
 extend@~3.0.0, extend@~3.0.1:
-  version "3.0.1"
-  resolved "http://registry.npm.taobao.org/extend/download/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
 
 extglob@^0.3.1:
   version "0.3.2"