Fixed CI

Author: mitya-y

.github/workflows/ubuntu.yml

@@ -2,9 +2,11 @@ name: Compile, run tests and check code style
 
 on:
   push:
-    branches: [ "master", "test-ci" ]
+    branches:
+      - '**'
   pull_request:
-    branches: [ "master" ]
+    branches:
+      - '**'
 
 jobs:
   build: