Update rubocop-minitest requirement from 0.10.1 to 0.10.2

Updates the requirements on [rubocop-minitest](https://github.com/rubocop-hq/rubocop-minitest) to permit the latest version.
- [Release notes](https://github.com/rubocop-hq/rubocop-minitest/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-minitest/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-minitest@v0.10.1...v0.10.2)

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -7,6 +7,6 @@ gem "minitest-ci", "~> 3.4"
 gem "minitest-reporters", "~> 1.3"
 gem "rake", "~> 13.0"
 gem "rubocop", "1.4.2"
-gem "rubocop-minitest", "0.10.1"
+gem "rubocop-minitest", "0.10.2"
 gem "rubocop-packaging", "0.5.1"
 gem "rubocop-performance", "1.9.1"