Add OpCodes.ASM_LATEST
Some projects (like maven plugins one, see https://github.com/apache/maven-plugin-tools/pull/32/files) explicitly need to state the supported ASM version and they use e.g. OpCodes.ASM8 to do that.
Because such projects don't upgrade often there is an issue that one needs to upgrade asm independently of the project that we depend on. And this creates an issue because it is not possible if one uses OpCodes.ASM*.
My suggestion is to create a simple pointer to the latest (non-experimental) version:
e.g.: OpCodes.ASM_LATEST = OpCodes.ASM9
And maybe: OpCodes.ASM_EXPERIMENTAL_LATEST = OpCodes.ASM10_EXPERIMENTAL
This way if project uses that *_LATEST alias it can be sure to support the newest possible ASM.