Upgrade: Update rake requirement from ~> 0.9.6 to ~> 12.3.3

Updates the requirements on [rake](https://github.com/ruby/rake) to permit the latest version.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@rake-0.9.6...v12.3.3)

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

Author: dependabot[bot]

Gemfile.lock

@@ -14,7 +14,7 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    rake (0.9.6)
+    rake (12.3.3)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -37,7 +37,7 @@ DEPENDENCIES
   bundler (>= 1.6.4)
   fit4ruby!
   pry (>= 0.12)
-  rake (~> 0.9.6)
+  rake (~> 12.3.3)
   rspec (>= 3.8)
   yard (~> 0.9.20)
 

fit4ruby.gemspec

@@ -26,7 +26,7 @@ EOT
 
   spec.add_dependency('bindata', '=2.3.0')
   spec.add_development_dependency('yard', '~>0.9.20')
-  spec.add_development_dependency('rake', '~>0.9.6')
+  spec.add_development_dependency('rake', '~>12.3.3')
   spec.add_development_dependency('bundler', '>=1.6.4')
   spec.add_development_dependency('rspec', '>=3.8')
   spec.add_development_dependency('pry', '>=0.12')