Bump rubocop-performance from 1.4.1 to 1.5.0 (#591)

Bumps [rubocop-performance](https://github.com/rubocop-hq/rubocop-performance) from 1.4.1 to 1.5.0.
- [Release notes](https://github.com/rubocop-hq/rubocop-performance/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-performance/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-performance@v1.4.1...v1.5.0)

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

Gemfile.lock

@@ -33,7 +33,7 @@ GEM
     octokit (4.14.0)
       sawyer (~> 0.8.0, >= 0.5.3)
     parallel (1.17.0)
-    parser (2.6.3.0)
+    parser (2.6.4.1)
       ast (~> 2.4.0)
     pry (0.12.2)
       coderay (~> 1.1.0)
@@ -50,7 +50,7 @@ GEM
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 1.7)
-    rubocop-performance (1.4.1)
+    rubocop-performance (1.5.0)
       rubocop (>= 0.71.0)
     ruby-progressbar (1.10.1)
     sawyer (0.8.1)