fix: 179 (#214)

Author: tristanMatthias

typings/index.d.ts

@@ -1,17 +1,16 @@
-interface AsymmetricMatcher {
-  $$typeof: Symbol;
-  sample?: string | RegExp | object | Array<any> | Function;
-}
+declare namespace jest {
+  interface AsymmetricMatcher {
+    $$typeof: Symbol;
+    sample?: string | RegExp | object | Array<any> | Function;
+  }
 
-type Value = string | number | RegExp | AsymmetricMatcher | undefined;
+  type Value = string | number | RegExp | AsymmetricMatcher | undefined;
 
-interface Options {
-  media?: string;
-  modifier?: string;
-  supports?: string;
-}
-
-declare namespace jest {
+  interface Options {
+    media?: string;
+    modifier?: string;
+    supports?: string;
+  }
 
   interface Matchers<R> {
     toHaveStyleRule(property: string, value?: Value, options?: Options): R;