fix: jitci compilation with java 14

Author: FrogDevelopper

jitpack.yml

@@ -1,3 +1,8 @@
 jdk:
   - openjdk14
 
+before_install:
+  - echo "Install java 14"
+  - wget https://github.com/sormuras/bach/raw/master/install-jdk.sh
+  - source install-jdk.sh --feature 14
+  - jshell --version