fix(oldieshim): avoid json3 being injected twice

bower json3 main entry is lib/json3.js not lib/son3.min.js so wiredep
injects the max version again

See
https://github.com/yeoman/generator-angular/commit/b421e13ba6029eeae3e43
cd12b65813464471b5b
fix(build): no need to ngAnnotate oldieshim

See
https://github.com/yeoman/generator-angular/commit/ed413a19880511f37f2b4
0c5c94ef0f675796e2f#diff-c90fa6beac4c4a4ca179fcb210e6e096R355
chore(gen): Bump grunt-contrib-imagemin dependency

See
https://github.com/yeoman/generator-angular/commit/e352ac45571a40d3d209d
8ad40cc886100375ee9
fix(deps): use latest 1.2.x ng

See
https://github.com/yeoman/generator-angular/commit/45c3eb67b1440956fb2fd
af0d536ff766f13fa0f
fix(wiredep): remove cwd property

See
https://github.com/yeoman/generator-angular/commit/dbe5d3e5d85965ba67e5a
47dfc2abb959992791d