Update minitest requirement from = 5.10.1 to = 5.15.0

Updates the requirements on [minitest](https://github.com/seattlerb/minitest) to permit the latest version.
- [Release notes](https://github.com/seattlerb/minitest/releases)
- [Changelog](https://github.com/seattlerb/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.10.1...v5.15.0)

---
updated-dependencies:
- dependency-name: minitest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -31,7 +31,7 @@ GEM
     keystone-engine (0.9.0)
       ffi (~> 1.9)
     method_source (1.0.0)
-    minitest (5.10.1)
+    minitest (5.15.0)
     one_gadget (1.7.4)
       elftools (>= 1.0.2, < 1.2.0)
     parallel (1.20.1)
@@ -77,7 +77,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  minitest (= 5.10.1)
+  minitest (= 5.15.0)
   pry (~> 0.10)
   pwntools!
   rake (~> 13.0)

pwntools.gemspec

@@ -39,7 +39,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'rubyserial', '~> 0.5'
 
   # TODO(david942j): check why ruby crash during testing if upgrade minitest to 5.10.2/3
-  s.add_development_dependency 'minitest', '= 5.10.1'
+  s.add_development_dependency 'minitest', '= 5.15.0'
   s.add_development_dependency 'pry', '~> 0.10'
   s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'rubocop', '~> 1'