Update elftools requirement from >= 1.0.2, < 1.2.0 to >= 1.0.2, < 1.4.0 (#218)

Updates the requirements on [elftools](https://github.com/david942j/rbelftools) to permit the latest version.
- [Release notes](https://github.com/david942j/rbelftools/releases)
- [Commits](david942j/rbelftools@v1.1.3...v1.3.1)

---
updated-dependencies:
- dependency-name: elftools
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     one_gadget (1.9.0)
-      elftools (>= 1.0.2, < 1.2.0)
+      elftools (>= 1.0.2, < 1.4.0)
 
 GEM
   remote: https://rubygems.org/
@@ -11,7 +11,7 @@ GEM
     bindata (2.5.0)
     diff-lcs (1.5.1)
     docile (1.4.1)
-    elftools (1.1.3)
+    elftools (1.3.1)
       bindata (~> 2)
     json (2.7.2)
     language_server-protocol (3.17.0.3)

one_gadget.gemspec

@@ -34,7 +34,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = '>= 3.1'
 
-  s.add_dependency 'elftools', '>= 1.0.2', '< 1.2.0'
+  s.add_dependency 'elftools', '>= 1.0.2', '< 1.4.0'
 
   s.add_development_dependency 'rake', '~> 13.0'
   s.add_development_dependency 'rspec', '~> 3.7'