lodash: changed _.snakeCase() method

lodash/lodash-tests.ts

@@ -1561,7 +1561,10 @@ result = <number>_.parseInt('08', 10);
 result = <number>_('08').parseInt();
 result = <number>_('08').parseInt(10);
 
+// _.snakeCase
 result = <string>_.snakeCase('Foo Bar');
+result = <string>_('Foo Bar').snakeCase();
+
 result = <string>_.startCase('--foo-bar');
 result = <boolean>_.startsWith('abc', 'a');
 

lodash/lodash.d.ts

@@ -7212,7 +7212,26 @@ declare module _ {
 
     interface LoDashStatic {
         repeat(str?: string, n?: number): string;
-        snakeCase(str?: string): string;
+    }
+
+    //_.snakeCase
+    interface LoDashStatic {
+        /**
+         * Converts string to snake case.
+         * @param string The string to convert.
+         * @return Returns the snake cased string.
+         */
+        snakeCase(string?: string): string;
+    }
+
+    interface LoDashWrapper<T> {
+        /**
+         * @see _.snakeCase
+         */
+        snakeCase(): string;
+    }
+
+    interface LoDashStatic {
         startCase(str?: string): string;
         startsWith(str?: string, target?: string, position?: number): boolean;
     }