Add number severity

Author: Shinigami92

src/rules/rule-config.d.ts

@@ -1,6 +1,6 @@
 import type { RuleSeverity } from './rule-severity';
 
 /**
- *
+ * Rule configuration.
  */
 export type RuleConfig<Options extends unknown[] = unknown[]> = RuleSeverity | [RuleSeverity, ...Options];

src/rules/rule-severity.d.ts

@@ -1,4 +1,4 @@
 /**
- *
+ * Rule severity.
  */
-export type RuleSeverity = 'off' | 'warn' | 'error';
+export type RuleSeverity = 'off' | 'warn' | 'error' | 0 | 1 | 2;