Update .travis.yml (#8)

.travis.yml

@@ -6,16 +6,19 @@ notifications:
 
 matrix:
   include:  
+  # Linux
   - os: linux
     julia: 1.1
   - os: linux
     julia: 1.0
+  # MacOS: Xcode version fixed at 9.2 due to bug
   - os: osx
     julia: 1.1
     osx_image: xcode9.2
   - os: osx
     julia: 1.0
     osx_image: xcode9.2
+  # Documentation
   - stage: "Documentation"
     julia: 1.0
     os: linux
@@ -26,9 +29,8 @@ matrix:
       - julia --project=docs/ docs/make.jl
     after_success: skip
 
+# Build script is hardwired to gcc8 on MacOS
 before_script: # homebrew for mac
-  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew update && brew cask uninstall --force oclint && brew install gcc@8; fi
+  - if [ "$TRAVIS_OS_NAME" == "osx" ]; then brew install gcc@8; fi
 
-after_success:
-  # push coverage results to Coveralls
-  - julia -e 'using Pkg; cd(Pkg.dir("FINUFFT")); Pkg.add("Coverage"); using Coverage; Coveralls.submit(Coveralls.process_folder())'
+coveralls: true