Use Java 8 bytecode at minimum

Follow-up to https://github.com/google/turbine/commit/006a74b6cd7565221a2d7fe9593c103bdd83584c. Supporting `-source 7 -target 7` regresses
support for type annotations, since turbine continues to emit the
attributes but they aren't recognized in v51 class files.

PiperOrigin-RevId: 399244322
2 files changed
tree: d643ca2d4f8f971e4aced4ff0cc2ba6b19ea20dc
  1. .github/
  2. java/
  3. javatests/
  4. proto/
  5. .gitattributes
  6. .gitignore
  7. LICENSE
  8. pom.xml
  9. README.md
README.md

Turbine

Turbine is a header compiler for Java.