feat: add height param to balanceOf call

* defaults to 'latest'

python/eth_erc20/erc20.py

@@ -16,6 +16,7 @@ from chainlib.eth.tx import (
     TxFormat,
 )
 from chainlib.jsonrpc import JSONRPCRequest
+from chainlib.block import BlockSpec
 from hexathon import (
     add_0x,
     strip_0x,
@@ -27,7 +28,7 @@ logg = logging.getLogger()
 class ERC20(TxFactory):
     
 
-    def balance_of(self, contract_address, address, sender_address=ZERO_ADDRESS, id_generator=None, height=None):
+    def balance_of(self, contract_address, address, sender_address=ZERO_ADDRESS, id_generator=None, height=BlockSpec.LATEST):
         j = JSONRPCRequest(id_generator)
         o = j.template()
         o['method'] = 'eth_call'

python/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = eth-erc20
-version = 0.5.1
+version = 0.5.2
 description = ERC20 interface and simple contract with deployment script that lets any address mint and gift itself tokens.
 author = Louis Holbrook
 author_email = dev@holbrook.no
@@ -20,7 +20,7 @@ classifiers =
 	License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
 	Topic :: Internet
 	#Topic :: Blockchain :: EVM
-license = OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+license = AGPLv3+
 licence_files =
 	LICENSE