Merge pull request #57 from logstash-plugins/jsvd-patch-1

Update .travis.yml to skip 7.x

Author: donoghuc

.travis.yml

@@ -1,8 +1,7 @@
 import:
-  - logstash-plugins/.ci:travis/defaults.yml@1.x
-  - logstash-plugins/.ci:travis/exec.yml@1.x
+  - logstash-plugins/.ci:travis/travis.yml@1.x
 
-env:
-  jobs:
-    - ELASTIC_STACK_VERSION=8.x
-    - SNAPSHOT=true ELASTIC_STACK_VERSION=8.x
+jobs:
+  exclude:
+  - env: ELASTIC_STACK_VERSION=7.current
+  - env: SNAPSHOT=true ELASTIC_STACK_VERSION=7.current