Make lint only run on 1.11 and higher

Signed-off-by: beorn7 <[email protected]>

Author: beorn7

.travis.yml

@@ -8,6 +8,6 @@ go:
 
 script:
   - make check_license unused test-short
-  - if [[ ! $TRAVIS_GO_VERSION =~ ^1\.9\.[x0-9]+$ ]]; then make lint; fi
+  - if [[ ! $TRAVIS_GO_VERSION =~ ^1\.(9|10)\. ]]; then make lint; fi
   # Style is only checked against the latest supported Go version.
   - if [[ $TRAVIS_GO_VERSION =~ ^1\.(12)\. ]]; then make style; fi