manage bundler groups correctly in CI workflow

- start by excluding coverage, docs, and lint
- reenable coverage and docs groups for primary
- run tests as last step
- ignore coverage group if Ruby version < 2.5.0

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 781acbaf..5ad259e6 100644
--- a/Gemfile
+++ b/Gemfile
@@ -37,4 +37,4 @@ end unless (Gem::Version.new RUBY_VERSION) < (Gem::Version.new '2.5.0')
 group :coverage do
   gem 'json', '~> 2.2.0' if RUBY_ENGINE == 'truffleruby'
   gem 'simplecov', '~> 0.16.0'
-end
+end unless (Gem::Version.new RUBY_VERSION) < (Gem::Version.new '2.5.0')