Add update() method to NoCaseDict class

src/microdot.py

@@ -146,6 +146,10 @@ class NoCaseDict(dict):
         kl = key.lower()
         return super().get(self.keymap.get(kl, kl), default)
 
+    def update(self, other_dict):
+        for key, value in other_dict.items():
+            self[key] = value
+
 
 def mro(cls):  # pragma: no cover
     """Return the method resolution order of a class.

tests/test_multidict.py

@@ -58,3 +58,11 @@ class TestMultiDict(unittest.TestCase):
         del d['oNE']
         self.assertEqual(list(d.items()), [('two', 5)])
         self.assertEqual(list(d.values()), [5])
+
+        d.update({'oNe': 1, 'two': 2, 'three': 3})
+        self.assertEqual(d['one'], 1)
+        self.assertEqual(d['ONE'], 1)
+        self.assertEqual(d['two'], 2)
+        self.assertEqual(d['TWO'], 2)
+        self.assertEqual(d['three'], 3)
+        self.assertEqual(d['THREE'], 3)