Bump will_paginate from 3.0.7 to 3.1.6

Bumps [will_paginate](https://github.com/mislav/will_paginate) from 3.0.7 to 3.1.6.
- [Release notes](https://github.com/mislav/will_paginate/releases)
- [Commits](mislav/will_paginate@v3.0.7...v3.1.6)

Gemfile.lock

@@ -261,7 +261,7 @@ GEM
       json (>= 1.8.0)
     warden (1.2.7)
       rack (>= 1.0)
-    will_paginate (3.0.7)
+    will_paginate (3.1.6)
     will_paginate-bootstrap (1.0.1)
       will_paginate (>= 3.0.3)
     xpath (2.0.0)