Update rake version to mitigate vulnerability CVE-2020-8130

Gemfile.lock

@@ -1,25 +1,30 @@
 PATH
   remote: .
   specs:
-    simplecov-rcov (0.2.3)
+    simplecov-rcov (0.3.0)
       simplecov (>= 0.4.1)
 
 GEM
   remote: http://rubygems.org/
   specs:
-    mocha (0.9.12)
-    multi_json (1.3.6)
-    rake (0.9.2)
-    simplecov (0.6.4)
-      multi_json (~> 1.0)
-      simplecov-html (~> 0.5.3)
-    simplecov-html (0.5.3)
+    docile (1.4.0)
+    mocha (1.14.0)
+    rake (13.0.6)
+    simplecov (0.21.2)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.12.3)
+    simplecov_json_formatter (0.1.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   bundler (>= 1.0.0.rc.6)
   mocha
-  rake
+  rake (>= 12.3.3)
   simplecov-rcov!
+
+BUNDLED WITH
+   1.17.2

lib/simplecov-rcov/version.rb

@@ -1,7 +1,7 @@
 module SimpleCov
   module Formatter
     class RcovFormatter
-      VERSION = "0.2.3"
+      VERSION = "0.3.0"
     end
   end
 end

simplecov-rcov.gemspec

@@ -23,5 +23,5 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'bundler', '>= 1.0.0.rc.6'
   s.add_development_dependency 'mocha'
-  s.add_development_dependency 'rake'
+  s.add_development_dependency 'rake', '>=12.3.3'
 end