bump: demurrage voucher (minor fixes)

`base_requirements.txt` can now be kept directly in sync with the `cicnet/cic` repo, as the proxy (and down the line maybe other things) are not relevant for the higher-level cic context.

Co-authored-by: lash <dev@holbrook.no>
Reviewed-on: #2
Co-authored-by: lash <accounts-grassrootseconomics@holbrook.no>
Co-committed-by: lash <accounts-grassrootseconomics@holbrook.no>

base_requirements.txt

@@ -8,9 +8,9 @@ eth-accounts-index==0.5.2
 eth-contract-registry==0.11.0
 erc20-faucet==0.8.0
 eth-address-index==0.7.3
-eth-token-index==0.6.1
+eth-token-index==0.6.2
 eth-faucet==0.3.4
 erc20-transfer-authorization==0.5.0
-erc20-demurrage-token==0.5.2
+erc20-demurrage-token==0.5.6
 eth-interface==0.1.1
 #cic-contracts==0.2.0