Update test-prof to v0.12.0 for Ruby 2.7

See https://github.com/test-prof/test-prof/blob/master/CHANGELOG.md.

Gemfile

@@ -415,7 +415,7 @@ group :test do
   gem 'webmock', '~> 3.5.1'
   gem 'rails-controller-testing'
   gem 'concurrent-ruby', '~> 1.1'
-  gem 'test-prof', '~> 0.10.0'
+  gem 'test-prof', '~> 0.12.0'
   gem 'rspec_junit_formatter'
   gem 'guard-rspec'
 

Gemfile.lock

@@ -1093,7 +1093,7 @@ GEM
     temple (0.8.2)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    test-prof (0.10.0)
+    test-prof (0.12.0)
     text (1.3.1)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
@@ -1430,7 +1430,7 @@ DEPENDENCIES
   stackprof (~> 0.2.15)
   state_machines-activerecord (~> 0.6.0)
   sys-filesystem (~> 1.1.6)
-  test-prof (~> 0.10.0)
+  test-prof (~> 0.12.0)
   thin (~> 1.7.0)
   timecop (~> 0.9.1)
   toml-rb (~> 1.0.0)