fix: ensure new webpack5 generator property in rules passes ruleset checks (#1753)

close #1729
Co-authored-by: Thorsten Luenborg <t.luneborg@googlemail.com>

lib/plugin-webpack5.js

@@ -20,6 +20,7 @@ const ruleSetCompiler = new RuleSetCompiler([
   new BasicEffectRulePlugin('sideEffects'),
   new BasicEffectRulePlugin('parser'),
   new BasicEffectRulePlugin('resolve'),
+  new BasicEffectRulePlugin('generator'),
   new UseEffectRulePlugin()
 ])