Bump spring from 1.1.3 to 1.7.2

Bumps [spring](https://github.com/rails/spring) from 1.1.3 to 1.7.2.
- [Release notes](https://github.com/rails/spring/releases)
- [Changelog](https://github.com/rails/spring/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/spring/compare/v1.1.3...v1.7.2)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Gemfile

@@ -142,7 +142,7 @@ group :development do
   gem 'guard-rails'
   gem 'guard-rspec', '~> 4.7.3'
   gem 'rubocop', '>= 0.49.1'
-  gem 'spring', '=1.1.3'
+  gem 'spring', '1.7.2'
   gem 'spring-commands-rspec'
 
   # 1.0.9 fixed openssl issues on macOS https://github.com/eventmachine/eventmachine/issues/602

Gemfile.lock

@@ -695,7 +695,7 @@ GEM
       rails (>= 3.1)
     spreadsheet (1.1.4)
       ruby-ole (>= 1.0)
-    spring (1.1.3)
+    spring (1.7.2)
     spring-commands-rspec (1.0.4)
       spring (>= 0.9.1)
     sprockets (2.2.3)
@@ -842,7 +842,7 @@ DEPENDENCIES
   spree_auth_devise!
   spree_i18n!
   spree_paypal_express!
-  spring (= 1.1.3)
+  spring (= 1.7.2)
   spring-commands-rspec
   stripe (~> 3.3.2)
   therubyracer (= 0.12.0)