modified CoAPCode for FETCH, PATCH and iPATCH

ttproto/core/lib/inet/coap.py

@@ -349,6 +349,9 @@ class _CoAPCodeDescription:
             2:	"POST",
             3:	"PUT",
             4:	"DELETE",
+            5:  "FETCH",
+            6:  "PATCH",
+            7:  "iPATCH",
 
             # Responses
             65:	"2.01 Created",
@@ -413,8 +416,7 @@ class CoAPType (UInt2):
         return super().__new__(cls, value)
 
 class CoAPCode (UInt8):
-    __values = "Empty", "GET", "POST", "PUT", "DELETE"
-
+    __values = "Empty", "GET", "POST", "PUT", "DELETE", "FETCH", "PATCH", "iPATCH"
     def __new__ (cls, value):
         if isinstance (value, str):
             try: