Update runtime dependencies for greater compatibility

The declared gem versions were too restrictive, preventing the use of the latest versions of these gems in projects that use this gem.

Closes #40

Gemfile.lock

@@ -1,10 +1,10 @@
 PATH
   remote: .
   specs:
-    keycloak (3.2.2)
-      json (= 2.6.2)
-      jwt (= 2.4.1)
-      rest-client (= 2.1.0)
+    keycloak (3.3.0)
+      json (~> 2.6)
+      jwt (~> 2.4)
+      rest-client (~> 2.1)
 
 GEM
   remote: https://rubygems.org/
@@ -51,4 +51,7 @@ DEPENDENCIES
   bundler (~> 2.3)
   keycloak!
   rake (~> 13.0)
-  rspec (~> 3.7)
+  rspec (~> 3.7)
+
+BUNDLED WITH
+   2.5.11

keycloak.gemspec

@@ -6,8 +6,8 @@ require "keycloak/version"
 Gem::Specification.new do |spec|
   spec.name          = "keycloak"
   spec.version       = Keycloak::VERSION
-  spec.authors       = ["Guilherme Portugues"]
-  spec.email         = ["g_portugues@hotmail.com"]
+  spec.authors       = ["Guilherme Portugues", "Leandro Vital Catarin"]
+  spec.email         = ["g_portugues@hotmail.com", "leavitals@gmail.com"]
 
   spec.summary       = %q{Add authentication to applications and secure services with Keycloak}
   #spec.description   = %q{TODO: Write a longer description or delete this line.}
@@ -33,7 +33,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "bundler", "~> 2.3"
   spec.add_development_dependency "rake", "~> 13.0"
   spec.add_development_dependency "rspec", "~> 3.7"
-  spec.add_runtime_dependency "rest-client", "~> 2.1.0"
-  spec.add_runtime_dependency "jwt", "~> 2.4.1"
-  spec.add_runtime_dependency "json", "~> 2.6.2"
+  spec.add_runtime_dependency "rest-client", "~> 2.1"
+  spec.add_runtime_dependency "jwt", "~> 2.4"
+  spec.add_runtime_dependency "json", "~> 2.6"
 end

lib/keycloak/version.rb

@@ -1,3 +1,3 @@
 module Keycloak
-  VERSION = '3.2.3'.freeze
+  VERSION = '3.3.0'.freeze
 end