Improve development dependencies constraints

Author: byroot

activerecord-typedstore.gemspec

@@ -24,8 +24,8 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rake', '~> 10'
   spec.add_development_dependency 'rspec', '~> 3'
   spec.add_development_dependency 'coveralls', '~> 0'
-  spec.add_development_dependency 'sqlite3', '~> 0'
-  spec.add_development_dependency 'pg', '~> 0'
-  spec.add_development_dependency 'mysql2', '~> 0'
-  spec.add_development_dependency 'database_cleaner', '~> 0'
+  spec.add_development_dependency 'sqlite3', '~> 1'
+  spec.add_development_dependency 'pg', '~> 0.18'
+  spec.add_development_dependency 'mysql2', '> 0.3'
+  spec.add_development_dependency 'database_cleaner', '~> 1'
 end

gemfiles/Gemfile.ar-3.2

@@ -6,6 +6,6 @@ gem 'rake'
 gem 'rspec'
 gem 'sqlite3'
 gem 'pg', '~> 0.11'
-gem 'mysql2'
+gem 'mysql2', '~> 0.3.10'
 gem 'database_cleaner'
 gem 'coveralls', require: false

gemfiles/Gemfile.ar-4.0

@@ -6,6 +6,6 @@ gem 'rake'
 gem 'rspec'
 gem 'sqlite3'
 gem 'pg', '~> 0.11'
-gem 'mysql2'
+gem 'mysql2', '~> 0.3.10'
 gem 'database_cleaner'
 gem 'coveralls', require: false

gemfiles/Gemfile.ar-4.1

@@ -6,6 +6,6 @@ gem 'rake'
 gem 'rspec'
 gem 'sqlite3'
 gem 'pg', '~> 0.11'
-gem 'mysql2'
+gem 'mysql2', '~> 0.3.13'
 gem 'database_cleaner'
 gem 'coveralls', require: false

gemfiles/Gemfile.ar-4.2

@@ -6,6 +6,6 @@ gem 'rake'
 gem 'rspec'
 gem 'sqlite3'
 gem 'pg', '~> 0.11'
-gem 'mysql2'
+gem 'mysql2', ['>= 0.3.13', '< 0.5']
 gem 'database_cleaner'
 gem 'coveralls', require: false

gemfiles/Gemfile.ar-edge

@@ -6,6 +6,6 @@ gem 'rake'
 gem 'rspec'
 gem 'sqlite3'
 gem 'pg', '~> 0.11'
-gem 'mysql2'
+gem 'mysql2', ['>= 0.3.13', '< 0.5']
 gem 'database_cleaner'
 gem 'coveralls', require: false