Pin securerandom dependency to 0.3.2

Unfortunately, tests run against Ruby 3.0 fail with:

securerandom-0.4.0 requires ruby version >= 3.1.0,
which is incompatible with the current version, 3.0.7

e.g.: https://github.com/nomadium/linzer/actions/runs/12129823522/job/33819248467

Gemfile

@@ -11,7 +11,7 @@ gem "rake", "~> 13.0"
 
 gem "rspec", "~> 3.0"
 
-gem "securerandom"
+gem "securerandom", "~> 0.3.2" # securerandom-0.4.0 requires ruby >= 3.1.0
 
 gem "standard", "~> 1.3"
 

Gemfile.lock

@@ -59,7 +59,7 @@ GEM
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.30.0, < 2.0)
     ruby-progressbar (1.13.0)
-    securerandom (0.4.0)
+    securerandom (0.3.2)
     simplecov (0.22.0)
       docile (~> 1.1)
       simplecov-html (~> 0.11)
@@ -93,7 +93,7 @@ DEPENDENCIES
   linzer!
   rake (~> 13.0)
   rspec (~> 3.0)
-  securerandom
+  securerandom (~> 0.3.2)
   simplecov
   standard (~> 1.3)