Added 'cc' to lint the C++ code on 'npm lint'

[IvanSanchez]

The whitespace fumble at https://github.com/node-serialport/node-serialport/pull/1483/files#r168511525 made me think that node-serialport uses eslint for linting the javascript code, but doesn't do anything for the c++ code.

This change adds cc as a dependency, which in turn runs the python cpplint script. All of the c++ code, except for some bits in the osx headers, seem to pass the linting.

[reconbot]

Get it passing and will happily merge 👍

[IvanSanchez]

Apparently the build fails because some file is renamed into src/serialport_linux.cpp, but right now I can't see what's making that happen 😐

[IvanSanchez]

ZOMG, and some travis tests are running the c++ linter over the whole nodejs source code tree, failing everywhere 🤦‍♂️

[IvanSanchez]

OK, the linux/mac builds pass 🎉, but apparently I made some change that made the win32 builds fail 😢:

  C:\projects\node-serialport\node_modules\nan\nan.h(1568): note: see declaration of 'Nan::Callback::Call'
..\src\serialport_win.cpp(181): error C2440: 'static_cast': cannot convert from 'HANDLE' to 'int' [C:\projects\node-serialport\build\serialport.vcxproj]
  C:\projects\node-serialport\node_modules\nan\nan.h(1568): note: see declaration of 'Nan::Callback::Call'
..\src\serialport_win.cpp(616): error C2440: 'reinterpret_cast': cannot convert from 'const GUID *' to 'GUID *' [C:\projects\node-serialport\build\serialport.vcxproj]

[IvanSanchez]

🎉

[reconbot]

Can you rebase?

[codecov-io]

Codecov Report

Merging #1501 into master will increase coverage by 0.76%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #1501      +/-   ##
=========================================
+ Coverage   79.04%   79.8%   +0.76%     
=========================================
  Files          21      19       -2     
  Lines         940     822     -118     
  Branches      170     165       -5     
=========================================
- Hits          743     656      -87     
+ Misses        197     166      -31

Impacted Files	Coverage Δ
lib/bindings/auto-detect.js	38.46% <0%> (-61.54%)	⬇️
lib/util.js	83.33% <0%> (-8.34%)	⬇️
lib/bindings/win32.js
lib/bindings/darwin.js

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[reconbot]

This is great, thank you!