Run Travis CI tests on both dev and stable Dart releases.
Run Travis CI tests on both dev and stable Dart releases.

QuiverDart/quiver_check,QuiverDart/quiver_mirrors,kevmoo/quiver-dart,QuiverDart/quiver_hashcode,QuiverDart/quiver_mirrors,QuiverDart/quiver_hashcode,QuiverDart/quiver_io,QuiverDart/quiver_collection,QuiverDart/quiver_check,QuiverDart/quiver_pattern,googlearchive/quiver_collection,googlearchive/quiver_check,googlearchive/quiver_io,yjbanov/quiver_async,kevmoo/quiver-dart,yjbanov/quiver_hashcode,QuiverDart/quiver_cache,googlearchive/quiver_optional,googlearchive/quiver_hashcode,QuiverDart/quiver_async,QuiverDart/quiver_pattern,googlearchive/quiver_strings,QuiverDart/quiver_time,jtmcdole/quiver-dart,googlearchive/quiver_collection,googlearchive/quiver_pattern,QuiverDart/quiver_optional,QuiverDart/quiver_strings,matgray/quiver_iterables,googlearchive/quiver_mirrors,googlearchive/quiver_async,googlearchive/quiver_iterables,googlearchive/quiver_time,cbracken/quiver-dart,willyp564/quiver-dart,QuiverDart/quiver_cache,googlearchive/quiver_iterables,google/quiver-dart,QuiverDart/quiver_time,EmmanuelOga/quiver-dart,QuiverDart/quiver_strings,googlearchive/quiver_strings,googlearchive/quiver_optional,QuiverDart/quiver_io,QuiverDart/quiver_optional,matgray/quiver_iterables,googlearchive/quiver_pattern,alechenninger/quiver-dart,yjbanov/quiver_hashcode,jtmcdole/quiver-dart,willyp564/quiver-dart,yjbanov/quiver_async,googlearchive/quiver_cache,googlearchive/quiver_cache,QuiverDart/quiver_async,QuiverDart/quiver_iterables,trinarytree/quiver-dart,googlearchive/quiver_io,googlearchive/quiver_time,alechenninger/quiver-dart,QuiverDart/quiver_collection,trinarytree/quiver-dart,cbracken/quiver-dart,googlearchive/quiver_hashcode,EmmanuelOga/quiver-dart,QuiverDart/quiver_iterables,googlearchive/quiver_mirrors,googlearchive/quiver_async,googlearchive/quiver_check