fix: ensure single default export in unified plugin entry, closes #1203 (#1204)

Author: Rel1cx

.pkgs/eslint-plugin-local/dist/index.d.ts

@@ -1,5 +1,7 @@
 import * as _typescript_eslint_utils_ts_eslint from '@typescript-eslint/utils/ts-eslint';
 
+type MessageID = "unexpectedComparison" | "useLooseComparisonSuggestion";
+
 declare const _default: {
     readonly meta: {
         readonly name: string;
@@ -8,7 +10,7 @@ declare const _default: {
     readonly rules: {
         readonly "avoid-multiline-template-expression": _typescript_eslint_utils_ts_eslint.RuleModule<"avoidMultilineTemplateExpression", [], unknown, _typescript_eslint_utils_ts_eslint.RuleListener>;
         readonly "no-shadow-underscore": _typescript_eslint_utils_ts_eslint.RuleModule<"noShadowUnderscore", [], unknown, _typescript_eslint_utils_ts_eslint.RuleListener>;
-        readonly "prefer-eqeq-nullish-comparison": _typescript_eslint_utils_ts_eslint.RuleModule<"unexpectedComparison" | "useLooseComparisonSuggestion", [], unknown, _typescript_eslint_utils_ts_eslint.RuleListener>;
+        readonly "prefer-eqeq-nullish-comparison": _typescript_eslint_utils_ts_eslint.RuleModule<MessageID, [], unknown, _typescript_eslint_utils_ts_eslint.RuleListener>;
     };
 };
 

packages/plugins/eslint-plugin/src/index.ts

@@ -29,7 +29,7 @@ function toLegacyConfig({ rules }: { rules: RulePreset }) {
   };
 }
 
-export const plugin: CompatiblePlugin = {
+const plugin: CompatiblePlugin = {
   meta: {
     name,
     version,