fix issue in coerceToType where coercing false to a boolean changes it to true

Author: vitosamson

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-json-editor",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "A JSON editor for ReactJS",
   "main": "dist/index.js",
   "scripts": {

src/lib/coerceToType.js

@@ -16,7 +16,7 @@ export default function coerceToType(value, nextType) {
       return '';
 
     case 'boolean':
-      return true;
+      return typeof value === 'boolean' ? value : true;
 
     case 'map':
       return {};

tests/lib/coerceToType.spec.js

@@ -43,4 +43,9 @@ describe('coerceToType', () => {
   it('returns null if nextType is unknown', () => {
     expect(coerceToType(42, 'foo')).toBe(null);
   });
+
+  it('when coercing a boolean to boolean, returns the same value', () => {
+    expect(coerceToType(true, 'boolean')).toEqual(true);
+    expect(coerceToType(false, 'boolean')).toEqual(false);
+  });
 });