Add more Rubies to be tested

.gitignore

@@ -9,3 +9,5 @@
 
 # rspec failure tracking
 .rspec_status
+
+Gemfile.lock

.travis.yml

@@ -2,12 +2,20 @@ sudo: false
 cache: bundler
 language: ruby
 rvm:
-  - 2.4.2
+  - 2.5
+  - 2.4
+  - 2.3
 before_install: gem install bundler -v 1.16.1
 
+stages:
+  - analyze
+  - test
+  - deploy
+
 jobs:
   include:
-    - stage: analyze
-      script: bundle exec rubocop
     - stage: test
       script: bundle exec rspec
+    - stage: analyze
+      script: bundle exec rubocop
+      rvm: 2.5

Gemfile.lock

@@ -1,133 +0,0 @@
-PATH
-  remote: .
-  specs:
-    psenv (0.3.0)
-      aws-sdk-ssm (~> 1)
-    psenv-rails (0.3.0)
-      psenv (= 0.3.0)
-      railties (>= 3.2, < 5.3)
-
-GEM
-  remote: https://rubygems.org/
-  specs:
-    actionpack (5.2.0)
-      actionview (= 5.2.0)
-      activesupport (= 5.2.0)
-      rack (~> 2.0)
-      rack-test (>= 0.6.3)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.0)
-      activesupport (= 5.2.0)
-      builder (~> 3.1)
-      erubi (~> 1.4)
-      rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activesupport (5.2.0)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
-    ast (2.4.0)
-    aws-partitions (1.79.0)
-    aws-sdk-core (3.19.0)
-      aws-partitions (~> 1.0)
-      aws-sigv4 (~> 1.0)
-      jmespath (~> 1.0)
-    aws-sdk-ssm (1.10.0)
-      aws-sdk-core (~> 3)
-      aws-sigv4 (~> 1.0)
-    aws-sigv4 (1.0.2)
-    builder (3.2.3)
-    coderay (1.1.2)
-    concurrent-ruby (1.0.5)
-    crack (0.4.3)
-      safe_yaml (~> 1.0.0)
-    crass (1.0.4)
-    diff-lcs (1.3)
-    erubi (1.7.1)
-    hashdiff (0.3.7)
-    i18n (1.0.0)
-      concurrent-ruby (~> 1.0)
-    jmespath (1.4.0)
-    loofah (2.2.2)
-      crass (~> 1.0.2)
-      nokogiri (>= 1.5.9)
-    method_source (0.9.0)
-    mini_portile2 (2.3.0)
-    minitest (5.11.3)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.3.0)
-    parallel (1.12.1)
-    parser (2.5.0.5)
-      ast (~> 2.4.0)
-    powerpack (0.1.1)
-    pry (0.11.3)
-      coderay (~> 1.1.0)
-      method_source (~> 0.9.0)
-    public_suffix (3.0.2)
-    rack (2.0.4)
-    rack-test (1.0.0)
-      rack (>= 1.0, < 3)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
-      nokogiri (>= 1.6)
-    rails-html-sanitizer (1.0.4)
-      loofah (~> 2.2, >= 2.2.2)
-    railties (5.2.0)
-      actionpack (= 5.2.0)
-      activesupport (= 5.2.0)
-      method_source
-      rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
-    rainbow (3.0.0)
-    rake (10.5.0)
-    rspec (3.7.0)
-      rspec-core (~> 3.7.0)
-      rspec-expectations (~> 3.7.0)
-      rspec-mocks (~> 3.7.0)
-    rspec-core (3.7.1)
-      rspec-support (~> 3.7.0)
-    rspec-expectations (3.7.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.7.0)
-    rspec-mocks (3.7.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.7.0)
-    rspec-support (3.7.1)
-    rubocop (0.54.0)
-      parallel (~> 1.10)
-      parser (>= 2.5)
-      powerpack (~> 0.1)
-      rainbow (>= 2.2.2, < 4.0)
-      ruby-progressbar (~> 1.7)
-      unicode-display_width (~> 1.0, >= 1.0.1)
-    ruby-progressbar (1.9.0)
-    safe_yaml (1.0.4)
-    thor (0.20.0)
-    thread_safe (0.3.6)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
-    unicode-display_width (1.3.0)
-    webmock (3.3.0)
-      addressable (>= 2.3.6)
-      crack (>= 0.3.2)
-      hashdiff
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  bundler (~> 1.16)
-  pry
-  psenv!
-  psenv-rails!
-  rake (~> 10.0)
-  rspec (~> 3.0)
-  rubocop (= 0.54)
-  webmock (~> 3.3)
-
-BUNDLED WITH
-   1.16.1