Updates TravisCI config and rolls back simplecov gem version to support CodeClimate

Author: svyatov

.travis.yml

@@ -1,5 +1,6 @@
 ---
-sudo: false
+dist: bionic
+os: linux
 language: ruby
 cache: bundler
 
@@ -15,7 +16,7 @@ rvm:
   - jruby-head
   - truffleruby
 
-matrix:
+jobs:
   allow_failures:
     - rvm: ruby-head
     - rvm: jruby-head

http_wrapper.gemspec

@@ -26,6 +26,6 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop', '~> 0.80'
   spec.add_development_dependency 'rubocop-performance', '~> 1.5'
   spec.add_development_dependency 'rubocop-rspec', '~> 1.38'
-  spec.add_development_dependency 'simplecov', '~> 0.18'
+  spec.add_development_dependency 'simplecov', '~> 0.17.1'
   spec.add_development_dependency 'webmock', '~> 3.8'
 end