Update CI branch filters for new workflow

Author: bluetech

.github/workflows/main.yml

@@ -10,12 +10,14 @@ on:
   push:
     branches:
       - master
+      - [0-9].[0-9].x
     tags:
       - "*"
 
   pull_request:
     branches:
       - master
+      - [0-9].[0-9].x
 
 jobs:
   build:

.travis.yml

@@ -82,6 +82,5 @@ notifications:
 branches:
   only:
     - master
-    - features
     - 4.6-maintenance
-    - /^\d+(\.\d+)+$/
+    - /^\d+\.\d+\.x$/