Strip down the versions to get faster build time.

.travis.yml

@@ -2,21 +2,8 @@
 #
 # NB: don't set `language: haskell` here
 env:
- - CABALVER=1.16 GHCVER=7.0.1
- - CABALVER=1.16 GHCVER=7.0.2
- - CABALVER=1.16 GHCVER=7.0.3
- - CABALVER=1.16 GHCVER=7.0.4
  - CABALVER=1.16 GHCVER=7.2.1
  - CABALVER=1.16 GHCVER=7.2.2
- - CABALVER=1.16 GHCVER=7.4.1
- - CABALVER=1.16 GHCVER=7.4.2
- - CABALVER=1.16 GHCVER=7.6.1
- - CABALVER=1.16 GHCVER=7.6.2
- - CABALVER=1.18 GHCVER=7.6.3
- - CABALVER=1.18 GHCVER=7.8.1
- - CABALVER=1.18 GHCVER=7.8.2
- - CABALVER=1.18 GHCVER=7.8.3
- - CABALVER=1.22 GHCVER=7.10.1
 
 # Note: the distinction between `before_install` and `install` is not important.
 before_install:
@@ -29,13 +16,13 @@ install:
  - cabal --version
  - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
  - travis_retry cabal update
- - cabal install --only-dependencies --enable-tests --enable-benchmarks
+ - cabal install --only-dependencies
 
 # Here starts the actual work to be performed for the package under test; any command which exits with a non-zero exit code causes the build to fail.
 script:
  - if [ -f configure.ac ]; then autoreconf -i; fi
  - cabal --version
- - cabal configure --enable-tests --enable-benchmarks -v2  # -v2 provides useful information for debugging
+ - cabal configure -v2  # -v2 provides useful information for debugging
  - cabal build   # this builds all libraries and executables (including tests/benchmarks)
  - cabal check
  - cabal sdist   # tests that a source-distribution can be generated