Update Error Prone to 2.0.13

http://repo1.maven.org/maven2/com/google/errorprone/error_prone_core/2.0.13/error_prone_core-2.0.13.jar
http://repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.0.13/error_prone_annotations-2.0.13.jar
http://repo1.maven.org/maven2/com/google/errorprone/error_prone_annotation/2.0.13/error_prone_annotation-2.0.13.jar

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Change-Id: I4e8e8d82161860f9c758c0a957b0ccab7cbcb1bb
Reviewed-on: https://bazel-review.googlesource.com/#/c/6210/
MOS_MIGRATED_REVID=135470690