Merge pull request #6 from markdown-doc/dependabot/npm_and_yarn/extend-3.0.2

build(deps): bump extend from 3.0.1 to 3.0.2

Author: cpylua

yarn.lock

@@ -51,8 +51,8 @@ esprima@^4.0.0:
   resolved "http://registry.npm.taobao.org/esprima/download/esprima-4.0.0.tgz#4499eddcd1110e0b218bacf2fa7f7f59f55ca804"
 
 extend@^3.0.0:
-  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"
 
 fault@^1.0.1:
   version "1.0.1"