Bump derailed_benchmarks from 1.4.1 to 1.4.2 (#12418)

Bumps [derailed_benchmarks](https://github.com/schneems/derailed_benchmarks) from 1.4.1 to 1.4.2.
- [Release notes](https://github.com/schneems/derailed_benchmarks/releases)
- [Changelog](https://github.com/schneems/derailed_benchmarks/blob/master/CHANGELOG.md)
- [Commits](https://github.com/schneems/derailed_benchmarks/compare/v1.4.1...v1.4.2)

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

Gemfile.lock

@@ -188,7 +188,7 @@ GEM
     css_parser (1.7.0)
       addressable
     debug_inspector (0.0.3)
-    derailed_benchmarks (1.4.1)
+    derailed_benchmarks (1.4.2)
       benchmark-ips (~> 2)
       get_process_mem (~> 0)
       heapy (~> 0)
@@ -266,7 +266,7 @@ GEM
     fuubar (2.5.0)
       rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)
-    get_process_mem (0.2.4)
+    get_process_mem (0.2.5)
       ffi (~> 1.0)
     globalid (0.4.2)
       activesupport (>= 4.2.0)