Bump simplecov from 0.15.1 to 0.16.1

Bumps [simplecov](https://github.com/colszowka/simplecov) from 0.15.1 to 0.16.1.
- [Release notes](https://github.com/colszowka/simplecov/releases)
- [Changelog](https://github.com/colszowka/simplecov/blob/master/CHANGELOG.md)
- [Commits](simplecov-ruby/simplecov@v0.15.1...v0.16.1)

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

Gemfile

@@ -14,7 +14,7 @@ group :development, :test do
   gem 'rake', '~> 12.3'
   gem 'rubocop', '~> 0.49.1', require: false
   gem 'rubocop-rspec', '~> 1.16.0', require: false
-  gem 'simplecov', '~> 0.15', require: false
+  gem 'simplecov', '~> 0.16', require: false
 end
 
 group :test do

Gemfile.lock

@@ -42,7 +42,7 @@ GEM
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     diff-lcs (1.3)
-    docile (1.1.5)
+    docile (1.3.0)
     eventmachine (1.2.5)
     faraday (0.14.0)
       multipart-post (>= 1.2, < 3)
@@ -106,8 +106,8 @@ GEM
       rubocop (>= 0.49.0)
     ruby-progressbar (1.9.0)
     safe_yaml (1.0.4)
-    simplecov (0.15.1)
-      docile (~> 1.1.0)
+    simplecov (0.16.1)
+      docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
@@ -169,7 +169,7 @@ DEPENDENCIES
   rspec (~> 3.7)
   rubocop (~> 0.49.1)
   rubocop-rspec (~> 1.16.0)
-  simplecov (~> 0.15)
+  simplecov (~> 0.16)
   sinatra (~> 2.0)
   sinatra-contrib
   slack-ruby-bot (~> 0.10)