Ensure fp.update does not convert end of path to an object. [closes #2271]

fp/_baseConvert.js

@@ -235,6 +235,7 @@ function baseConvert(util, name, func, options) {
 
     var index = -1,
         length = path.length,
+        lastIndex = length - 1,
         result = clone(Object(object)),
         nested = result;
 
@@ -243,7 +244,7 @@ function baseConvert(util, name, func, options) {
           value = nested[key];
 
       if (value != null) {
-        nested[key] = clone(Object(value));
+        nested[path[index]] = clone(index == lastIndex ? value : Object(value));
       }
       nested = nested[key];
     }

test/test-fp.js

@@ -1474,6 +1474,19 @@
 
   /*--------------------------------------------------------------------------*/
 
+  QUnit.module('fp.update');
+
+  (function() {
+    QUnit.test('should not convert end of `path` to an object', function(assert) {
+      assert.expect(1);
+
+      var actual = fp.update('a.b')(_.identity)({ 'a': { 'b': 1 } });
+      assert.strictEqual(typeof actual.a.b, 'number');
+    });
+  }());
+
+  /*--------------------------------------------------------------------------*/
+
   QUnit.module('padChars methods');
 
   _.each(['padChars', 'padCharsStart', 'padCharsEnd'], function(methodName) {