handling of java args not consistent #19

Out of the following 2 lines, only the second does the right thing, namely enabling of a certain JVM module.

javabridge.start_vm(args=["--add-modules","jdk.incubator.foreign"])
javabridge.start_vm(args=["--add-modules=jdk.incubator.foreign"])

This is inconsistent, with the JVM behaviour which takes the 2 command line arguments as being the same:

java --add-modules jdk.incubator.foreign
java --add-modules=jdk.incubator.foreign