Criticality score seems too high

[hogo6002]

The criticality score for repo github-scarecrow is 0.20436, but this repository is a testing repository with no pull request.

~/go/bin$ ./criticality_score -gcp-project-id=clusterfuzz-external -format json https://github.com/Alan32Liu/github-scarecrow
2023-06-02 11:03:42.172 INFO Preparing default scorer
2023-06-02 11:03:43.612 INFO deps.dev signal source enabled
2023-06-02 11:03:44.929 INFO Collecting {"url": "https://github.com/Alan32Liu/github-scarecrow", "canonical_url": "https://github.com/Alan32Liu/github-scarecrow"}
2023-06-02 11:03:48.903 INFO Dependent count table exists {"project_id": "clusterfuzz-external", "dataset": "criticality_score_data"}
{"default_score":"0.20436","depsdev":{"dependent_count":null},"legacy":{"closed_issues_count":2,"commit_frequency":0.12,"contributor_count":1,"created_since":14,"github_mention_count":0,"issue_comment_frequency":0,"org_count":1,"recent_release_count":0,"updated_issues_count":2,"updated_since":9},"repo":{"created_at":"2022-03-23T10:17:35Z","language":"C++","license":"MIT License","star_count":0,"updated_at":"2022-09-01T01:35:33Z","url":"https://github.com/Alan32Liu/github-scarecrow"}}