Merge PR #34 'Release version 3.3'

Author: darosior

CHANGELOG.md

@@ -1,3 +1,9 @@
+# 3.3
+
+- Implement a pure Python fallback for RIPEMD160 in case `hashlib` does not provide it.
+  NOTE: the Python implementation was copied from a test-only implementation and is not constant
+  time. This shouldn't be an issue for the usage we make of it here.
+
 # 3.1
 
 - Actually support Coincurve up to version 17..

bip32/__init__.py

@@ -1,7 +1,7 @@
 from .bip32 import BIP32, PrivateDerivationError, InvalidInputError
 from .utils import BIP32DerivationError, HARDENED_INDEX
 
-__version__ = "3.1"
+__version__ = "3.3"
 
 __all__ = [
     "BIP32",