Update .travis.yml

Author: dextorious

.travis.yml

@@ -4,8 +4,7 @@ os:
   - linux
   - osx
 julia:
-  - 1.2
-  - 1.3
+  - 1.4
   - 1
   - nightly
 notifications:
@@ -14,4 +13,4 @@ after_success:
   - if [[ $TRAVIS_JULIA_VERSION = 1 ]] && [[ $TRAVIS_OS_NAME = linux ]]; then
       julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder())';
       julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Coveralls.submit(process_folder())';
-    fi
+    fi