New spring binstub

.rubocop.yml

     - 'db/schema.rb'
 
 # Offense count: 1
-# Configuration parameters: AllowSafeAssignment.
-Lint/AssignmentInCondition:
-  Exclude:
-    - 'bin/spring'
-
-# Offense count: 1
 # Configuration parameters: Whitelist.
 # Whitelist: present?, blank?, presence, try, try!
 Lint/SafeNavigationChain:

bin/spring

   require 'bundler'
 
   lockfile = Bundler::LockfileParser.new(Bundler.default_lockfile.read)
-  if spring = lockfile.specs.detect { |spec| spec.name == "spring" }
+  spring = lockfile.specs.detect { |spec| spec.name == "spring" }
+  if spring
     Gem.use_paths Gem.dir, Bundler.bundle_path.to_s, *Gem.path
     gem 'spring', spring.version
     require 'spring/binstub'