Fix typo in coverage submission

Author: Chris Foster

.travis.yml

@@ -30,5 +30,5 @@ jobs:
 after_success:
 #  - julia -e 'Pkg.add("Unitful")' ?
   - if [ $TRAVIS_JULIA_VERSION = "1.0" ] && [ $TRAVIS_OS_NAME = "linux" ]; then
-      julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Coveralls.submit(process_folder())'
+      julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Coveralls.submit(process_folder())';
     fi