Bump version to 5.1.0

java/defs.bzl

diff --git a/java/defs.bzl b/java/defs.bzl
index feedf52..51947bd 100644
--- a/java/defs.bzl
+++ b/java/defs.bzl
@@ -16,7 +16,7 @@
 # Do not touch: This line marks the end of loads; needed for PR importing.
 
 _MIGRATION_TAG = "__JAVA_RULES_MIGRATION_DO_NOT_USE_WILL_BREAK__"
-version = "5.0.0"
+version = "5.1.0"
 
 def _add_tags(attrs):
     if "tags" in attrs and attrs["tags"] != None: