[roll] Update 3p packages

     _discoveryapis_commons      0.1.8 --> 0.1.8+1
               bazel_worker     0.1.14 --> <none>
                buildbucket      0.3.0 --> 0.4.0
               connectivity      0.3.1 --> 0.3.2
                   coverage     0.12.2 --> 0.12.3
                     csslib     0.14.5 --> 0.14.6
flutter_staggered_grid_view      0.2.2 --> 0.2.3
                flutter_svg     <none> --> 0.6.2
                 googleapis     0.51.1 --> 0.52.0+1
            googleapis_auth    0.2.5+2 --> 0.2.5+3
                       http  0.11.3+17 --> 0.12.0
           package_resolver      1.0.4 --> 1.0.6
          palette_generator      0.1.0 --> 0.1.1
               path_drawing     <none> --> 0.3.1
               path_parsing     <none> --> 0.1.3
                petitparser      1.7.7 --> 2.0.2
                source_maps     0.10.7 --> 0.10.8
                       test      1.3.0 --> 1.3.4
               url_launcher      3.0.3 --> 4.0.1
               video_player      0.6.4 --> 0.7.2
                        xml      3.0.1 --> 3.2.3

Test: CQ

Change-Id: If8aee7cbfd4946baf062ac6511d7d123e9661ae2
664 files changed