Merge pull request #101 from tak30/otp27

Adding OTP27 to the tested versions in CI

Author: kuenishi

.github/workflows/checkall.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        version: [22, 23, 24, 25, 26]
+        version: [22, 23, 24, 25, 26, 27]
     runs-on: ubuntu-latest
 
     container: