Test against 2.6 and bump year and gemspec

Also drop rbx

.travis.yml

@@ -14,17 +14,19 @@ matrix:
       env: json_lib=json
     - rvm: 2.5
       env: json_lib=yajl
+    - rvm: 2.6
+      env: json_lib=json
+    - rvm: 2.6
+      env: json_lib=yajl
     - rvm: ruby-head
       env: json_lib=json
     - rvm: ruby-head
       env: json_lib=yajl
     - rvm: jruby
       env: JRUBY_OPTS=--debug
-    - rvm: rbx
 
   allow_failures:
     - rvm: 2.4
       env: json_lib=json
     - rvm: 2.4
       env: json_lib=yajl
-    - rvm: rbx

README.md

@@ -41,7 +41,7 @@ less memory, less conflicts, and run faster.
 
 ### Mandatory:
 
-* Tested with MRI (official CRuby), Rubinius and JRuby.
+* Tested with MRI (official CRuby) and JRuby.
 * gem [rest-builder][]
 * gem [promise_pool][]
 * gem [timers][]
@@ -720,7 +720,7 @@ the priority here is:
 
 Apache License 2.0 (Apache-2.0)
 
-Copyright (c) 2011-2018, Lin Jen-Shin (godfat)
+Copyright (c) 2011-2019, Lin Jen-Shin (godfat)
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

rest-core.gemspec

@@ -8,7 +8,7 @@ Gem::Specification.new do |s|
   s.required_rubygems_version = Gem::Requirement.new(">= 0".freeze) if s.respond_to? :required_rubygems_version=
   s.require_paths = ["lib".freeze]
   s.authors = ["Lin Jen-Shin (godfat)".freeze]
-  s.date = "2018-03-20"
+  s.date = "2018-12-26"
   s.description = "Various [rest-builder](https://github.com/godfat/rest-builder) middleware\nfor building REST clients.\n\nCheckout [rest-more](https://github.com/godfat/rest-more) for pre-built\nclients.".freeze
   s.email = ["godfat (XD) godfat.org".freeze]
   s.files = [
@@ -93,7 +93,7 @@ Gem::Specification.new do |s|
   "test/test_universal.rb".freeze]
   s.homepage = "https://github.com/godfat/rest-core".freeze
   s.licenses = ["Apache-2.0".freeze]
-  s.rubygems_version = "2.7.6".freeze
+  s.rubygems_version = "3.0.1".freeze
   s.summary = "Various [rest-builder](https://github.com/godfat/rest-builder) middleware".freeze
   s.test_files = [
   "test/test_auth_basic.rb".freeze,