added definitions and tests for lcFirst and lowerCaseFirst

change-case/change-case-tests.ts

@@ -35,3 +35,5 @@ b = changeCase.isLower(s);
 b = changeCase.isLowerCase(s);
 s = changeCase.ucFirst(s);
 s = changeCase.upperCaseFirst(s);
+s = changeCase.lcFirst(s);
+s = changeCase.lowerCaseFirst(s);

change-case/change-case.d.ts

@@ -34,4 +34,6 @@ declare module "change-case" {
     function isLowerCase(s: string): boolean;
     function ucFirst(s: string): string;
     function upperCaseFirst(s: string): string;
+    function lcFirst(s: string): string;
+    function lowerCaseFirst(s: string): string;
 }