add .solargraph.yml, to integrate with editors that can use it for LSP (#493)

# Conflicts:
#	CHANGELOG.md

Author: faisal

.solargraph.yml

@@ -0,0 +1,9 @@
+include:
+- "./**/*.rb"
+exclude:
+- ".bundle/**/*"
+require: []
+domains: []
+reporters:
+- rubocop
+- require_not_found

CHANGELOG.md

@@ -1,5 +1,6 @@
 # main [(unreleased)](https://github.com/whitesmith/rubycritic/compare/v4.9.1...main)
 
+* [CHANGE] Add .solargraph.yml config file to enable Solargraph LSP use in editors such as BBedit (by [@faisal])
 * [CHANGE] Drop support for Ruby 3.0.x (by [@faisal][])
 * [CHANGE] Bump minitest, mocha, rubocop dependencies (by [@faisal][])
 * [CHANGE] Drop support for Ruby 2.7.x (by [@faisal][])