update grpc library to 1.20.0
This is part two of the three step dance. The 1.20.0 libraries have been committed to GoB
The third step is to remove the old libraries from third_party (they are unused as of this CL).
RELNOTES: None
PROTO_FILES=$(ls src/main/protobuf/*.proto src/main/java/com/google/devtools/build/lib/buildeventstream/proto/*.proto)
LIBRARY_JARS=$(find third_party -name '*.jar' | grep -Fv JavaBuilder | grep -Fv third_party/guava | grep -Fv third_party/guava | grep -ve 'third_party/grpc/grpc.*jar' | tr "\n" " ")
-GRPC_JAVA_VERSION=1.10.0
+GRPC_JAVA_VERSION=1.20.0
GRPC_LIBRARY_JARS=$(find third_party/grpc -name '*.jar' | grep -e ".*${GRPC_JAVA_VERSION}.*jar" | tr "\n" " ")
GUAVA_VERSION=25.1
GUAVA_JARS=$(find third_party/guava -name '*.jar' | grep -e ".*${GUAVA_VERSION}.*jar" | tr "\n" " ")
