Fix type errors.

Library/Homebrew/livecheck/livecheck.rb

@@ -974,7 +974,7 @@ module Homebrew
           end
         end
 
-        res_current = resource.version
+        res_current = T.must(resource.version)
         res_latest = Version.new(match_version_map.values.max_by { |v| LivecheckVersion.create(resource, v) })
 
         return status_hash(resource, "error", ["Unable to get versions"], verbose: verbose) if res_latest.blank?

Library/Homebrew/resource.rb

@@ -194,7 +194,7 @@ class Resource < Downloadable
   def version(val = nil)
     return super() if val.nil?
 
-    @version = case val
+    @version = case T.unsafe(val)
     when String
       val.blank? ? Version::NULL : Version.new(val)
     when Version