test: skip version string assertion when testing native gems

because the native gems CI pipeline clobbers the version with a
timestamp.

Author: flavorjones

test/test_sqlite3.rb

@@ -19,6 +19,7 @@ def test_threadsafe?
     end
 
     def test_version_strings
+      skip if SQLite3::VERSION.include?("test") # see set-version-to-timestamp rake task
       assert_equal(SQLite3::VERSION, SQLite3::VersionProxy::STRING)
     end
   end