Bump extend from 3.0.1 to 3.0.2 in /samples/photo_album (#97)

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)

Author: dependabot[bot]

samples/photo_album/yarn.lock

@@ -2442,8 +2442,8 @@ express@^4.13.3:
     vary "~1.1.2"
 
 extend@^3.0.0, extend@~3.0.0, extend@~3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.2.tgz#f8b1136b4071fbd8eb140aff858b1019ec2915fa"
 
 external-editor@^2.0.4:
   version "2.1.0"