Add Java 14 on CI (#357)

Author: ultrasecreth

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
     # Definition of the build matrix
     strategy:
       matrix:
-        java: [8, 11]
+        java: [8, 11, 14]
 
     # All build steps
     # SINGLE-MATRIX-JOB means that the step does not need to be executed on every job in the matrix