chore(deps): bump lodash.mergewith in /test/ng-build/ng6 (#2209)

Bumps [lodash.mergewith](https://github.com/lodash/lodash) from 4.6.0 to 4.6.2.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

test/ng-build/ng6/yarn.lock

@@ -4289,8 +4289,9 @@ lodash.keys@~2.4.1:
     lodash.isobject "~2.4.1"
 
 lodash.mergewith@^4.6.0:
-  version "4.6.0"
-  resolved "https://registry.yarnpkg.com/lodash.mergewith/-/lodash.mergewith-4.6.0.tgz#150cf0a16791f5903b8891eab154609274bdea55"
+  version "4.6.2"
+  resolved "https://registry.yarnpkg.com/lodash.mergewith/-/lodash.mergewith-4.6.2.tgz#617121f89ac55f59047c7aec1ccd6654c6590f55"
+  integrity sha512-GK3g5RPZWTRSeLSpgP8Xhra+pnjBC56q9FZYe1d5RN3TJ35dbkGy3YqBSMbyCrlbi+CM9Z3Jk5yTL7RCsqboyQ==
 
 lodash.noop@^3.0.1:
   version "3.0.1"