Bump bootstrap-switch-rails to 3.3.3

Bumps [bootstrap-switch-rails](https://github.com/manuelvanrijn/bootstrap-switch-rails) from 1.9.0 to 3.3.3.
- [Commits](manuelvanrijn/bootstrap-switch-rails@v1.9.0...v3.3.3)

I'll automatically resolve any conflicts with this PR as long as you don't alter it yourself.

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Author: dependabot[bot]

Gemfile

@@ -33,7 +33,7 @@ gem "github_api", '~> 0.17'
 
 gem 'bootstrap-sass', '~> 3.0.3'
 gem 'font-awesome-rails', '~> 4.0.3'
-gem 'bootstrap-switch-rails', '~> 1.9.0'
+gem 'bootstrap-switch-rails', '~> 3.3.3'
 gem 'kramdown'
 
 group :doc do

Gemfile.lock

@@ -31,7 +31,7 @@ GEM
     bcrypt (3.1.9)
     bootstrap-sass (3.0.3.0)
       sass (~> 3.2)
-    bootstrap-switch-rails (1.9.0)
+    bootstrap-switch-rails (3.3.3)
     builder (3.1.4)
     capybara (2.4.4)
       mime-types (>= 1.16)
@@ -332,7 +332,7 @@ PLATFORMS
 
 DEPENDENCIES
   bootstrap-sass (~> 3.0.3)
-  bootstrap-switch-rails (~> 1.9.0)
+  bootstrap-switch-rails (~> 3.3.3)
   coffee-rails (~> 4.0.0)
   coveralls
   cucumber-rails