Merge pull request #13 from tensor4all/terasaki/update-CI

Update CI to use LTS version of software

Author: terasakisatoshi

.github/workflows/CI.yml

@@ -19,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         version:
-          - '1.9'
+          - 'lts'
           - '1'
         os:
           - ubuntu-latest