Update supported versions.

Author: ioquatix

.travis.yml

@@ -2,14 +2,16 @@ language: ruby
 dist: xenial
 cache: bundler
 
+script: bundle exec rspec
+
 matrix:
   include:
-    - rvm: 2.4
     - rvm: 2.5
     - rvm: 2.6
     - rvm: 2.7
     - rvm: 2.6
       env: COVERAGE=PartialSummary,Coveralls
+    - rvm: 2.7
     - rvm: truffleruby
     - rvm: jruby-head
       env: JRUBY_OPTS="--debug -X+O"

protocol-http2.gemspec

@@ -18,13 +18,13 @@ Gem::Specification.new do |spec|
 	spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
 	spec.require_paths = ["lib"]
 
-	spec.required_ruby_version = '~> 2.4'
+	spec.required_ruby_version = '~> 2.5'
 
 	spec.add_dependency "protocol-hpack", "~> 1.4"
 	spec.add_dependency "protocol-http", "~> 0.15"
 
 	spec.add_development_dependency "covered"
+	spec.add_development_dependency "bake-bundler"
 	spec.add_development_dependency "bundler"
-	spec.add_development_dependency "rake", "~> 10.0"
 	spec.add_development_dependency "rspec", "~> 3.0"
 end