Upgrade dependencies and target frameworks

[erikzhang]

No description provided.

[codecov-io]

Codecov Report

Merging #216 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #216   +/-   ##
=======================================
  Coverage   79.57%   79.57%           
=======================================
  Files          17       17           
  Lines        1444     1444           
=======================================
  Hits         1149     1149           
  Misses        295      295

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[shargon]

Seems that dotnet-format is not working on mac/3x ..

[shargon]

I opened a issue in dotnet dotnet/format#400

[erikzhang]

I have a question: why do we need both linux and osx in travis?

[shargon]

We have two quick options:

• Remove osx
• Check dotnet-format only on linux

[erikzhang]

I prefer to remove osx directly.

[erikzhang]

I think we should move dotnet-format from before_script to script.

[shargon]

If dotnet-format fail, will travis continue if it is under script?

[erikzhang]

If dotnet-format fail, will continue if is it under script?

I think travis won't continue if dotnet-format fails in script.