Update .travis.yml

Author: pietechsolution

.travis.yml

@@ -25,5 +25,4 @@ before_script:
 
 script:
   - ./../flutter/bin/flutter analyze .
-  - ./../flutter/bin/cache/dart-sdk/bin/dartfmt --dry-run lib/
-  - ./../flutter/bin/cache/dart-sdk/bin/dartfmt --dry-run example/lib/
+  - ./../flutter/bin/cache/dart-sdk/bin/dartfmt --dry-run lib