added seamless-immutable typings

Author: piotrwitek

src/typings/seamless-immutable.d.ts

@@ -0,0 +1,16 @@
+declare module 'seamless-immutable' {
+  interface IImmutableArray {
+    asMutable(): any[];
+  }
+  function Immutable(array: any[]): IImmutableArray;
+
+  interface IImmutableObject {
+    from(object: Object): IImmutableObject;
+    merge(obj: Object): IImmutableObject;
+    without(key: string | string[], ...restKeys: string[]): IImmutableObject;
+    asMutable(): Object;
+  }
+  function Immutable(object: Object): IImmutableObject;
+
+  export default Immutable;
+}