Revert "Lock bigdecimal version to 3.1.4 or lower"

Author: yahonda

Gemfile.lock

@@ -86,7 +86,7 @@ PATH
       marcel (~> 1.0)
     activesupport (7.2.0.alpha)
       base64
-      bigdecimal (< 3.1.5)
+      bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
       connection_pool (>= 2.2.5)
       drb

activesupport/activesupport.gemspec

@@ -41,5 +41,5 @@ Gem::Specification.new do |s|
   s.add_dependency "minitest",        ">= 5.1"
   s.add_dependency "base64"
   s.add_dependency "drb"
-  s.add_dependency "bigdecimal",      "< 3.1.5"
+  s.add_dependency "bigdecimal"
 end