Add missing option processor (#35)

ESLint allows to specifing processor for plugins.
See more: https://eslint.org/docs/user-guide/configuring/plugins#specifying-processor

It has been added as an optional key to the types,
including inside the `overrides` key.

Author: xeho91

src/index.d.ts

@@ -78,6 +78,12 @@ export interface EslintConfig {
    * @see [Settings](https://eslint.org/docs/user-guide/configuring/configuration-files#adding-shared-settings)
    */
   settings?: Settings;
+  /**
+   * Specifying Processor.
+   *
+   * @see [processor](https://eslint.org/docs/user-guide/configuring/plugins#specifying-processor)
+   */
+  processor?: string;
 }
 
 /**

src/overrides.d.ts

@@ -25,6 +25,12 @@ export interface Override {
    * @see [Rules](https://eslint.org/docs/user-guide/configuring/rules)
    */
   rules?: Rules;
+  /**
+   * Specifying Processor.
+   *
+   * @see [processor](https://eslint.org/docs/user-guide/configuring/plugins#specifying-processor)
+   */
+  processor?: string;
 }
 
 /**