Update dependency spring from v1.7.2 to v4 (#168)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Gemfile

@@ -25,7 +25,7 @@ gem 'sdoc', '~> 2.6.0', group: :doc
 gem 'psych', '< 4.0.0', group: :doc
 
 # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
-gem 'spring', '~> 1.7.2', group: :development
+gem 'spring', '~> 4.1.0', group: :development
 
 # Use ActiveModel has_secure_password
 # gem 'bcrypt', '~> 3.1.7'

Gemfile.lock

@@ -639,7 +639,7 @@ GEM
     snaky_hash (2.0.1)
       hashie
       version_gem (~> 1.1, >= 1.1.1)
-    spring (1.7.2)
+    spring (4.1.1)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
@@ -804,7 +804,7 @@ DEPENDENCIES
   shoulda-matchers (~> 5.3.0)
   simple_form (~> 5.2.0)
   simplecov (~> 0.22.0)
-  spring (~> 1.7.2)
+  spring (~> 4.1.0)
   sqlite3
   therubyracer (~> 0.12)
   transpec!