[jira] [Created] (GROOVY-8540) Bump antlr to 4.7.1

[Daniel Sun (JIRA)]

Daniel Sun created GROOVY-8540:
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             Summary: Bump antlr to 4.7.1
                 Key: GROOVY-8540
                 URL: https://issues.apache.org/jira/browse/GROOVY-8540
             Project: Groovy
          Issue Type: Dependency upgrade
            Reporter: Daniel Sun
            Assignee: Daniel Sun
             Fix For: 3.0.0-alpha-2, 2.6.0-alpha-4






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