Fix testing with coverage (#81)

* Notify coverage gathering is done

When testing with coverage RubyLsp::LspReporter.instance.shutdown will
not actually shutdown. It expects to be notified via at_coverage_exit
so that it can gather coverage stats.

* Either shutdown or coverage_exit depending on coverage status

Co-authored-by: Stan Lo <[email protected]>

---------

Co-authored-by: Stan Lo <[email protected]>

Author: elmuerte

lib/ruby_lsp/ruby_lsp_rspec/rspec_formatter.rb

@@ -61,7 +61,11 @@ def example_pending(notification)
       end
 
       def stop(notification)
-        RubyLsp::LspReporter.instance.shutdown
+        if RubyLsp::LspReporter.start_coverage?
+          RubyLsp::LspReporter.instance.at_coverage_exit
+        else
+          RubyLsp::LspReporter.instance.shutdown
+        end
       end
 
       def uri_for(example)