script: add OP_TRUE and OP_FALSE aliases to OPCODES_BY_NAME

These aliases are already defined as module-level constants (OP_FALSE = OP_0,
OP_TRUE = OP_1) but were missing from the OPCODES_BY_NAME lookup dict,
making it impossible to parse script strings containing these common aliases.

Fixes #225

Author: Bortlesboat

bitcoin/core/script.py

@@ -365,12 +365,14 @@ def __new__(cls, n):
 
 OPCODES_BY_NAME = {
     'OP_0': OP_0,
+    'OP_FALSE': OP_0,
     'OP_PUSHDATA1': OP_PUSHDATA1,
     'OP_PUSHDATA2': OP_PUSHDATA2,
     'OP_PUSHDATA4': OP_PUSHDATA4,
     'OP_1NEGATE': OP_1NEGATE,
     'OP_RESERVED': OP_RESERVED,
     'OP_1': OP_1,
+    'OP_TRUE': OP_1,
     'OP_2': OP_2,
     'OP_3': OP_3,
     'OP_4': OP_4,