Update activesupport requirement from ~> 5.1.7 to >= 5.1.7, < 6.1.0

Updates the requirements on [activesupport](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v6.0.3.1/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v5.1.7...v6.0.3.1)

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

Gemfile.lock

@@ -2,7 +2,7 @@ PATH
   remote: .
   specs:
     ontologies_api_client (2.0.0)
-      activesupport (~> 5.1.7)
+      activesupport (>= 5.1.7, < 6.1.0)
       excon
       faraday
       lz4-ruby
@@ -13,11 +13,12 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.1.7)
+    activesupport (6.0.3.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
     coderay (1.1.3)
     concurrent-ruby (1.1.6)
     excon (0.76.0)
@@ -42,6 +43,7 @@ GEM
     thread_safe (0.3.6)
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
+    zeitwerk (2.4.0)
 
 PLATFORMS
   ruby

ontologies_api_client.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |gem|
   gem.add_dependency('excon')
   gem.add_dependency('lz4-ruby')
   gem.add_dependency('spawnling', '2.1.5')
-  gem.add_dependency('activesupport', '~> 5.1.7')
+  gem.add_dependency('activesupport', '>= 5.1.7', '< 6.1.0')
 
   # gem.executables = %w()
 end