* etc/deps.txt: use wtforms-alchemy==0.12.6: important fixes when using six>=1.7.0
* etc/deps.txt: use wtforms-alchemy==0.12.6: important fixes when using six>=1.7.0

abilian/abilian-core,abilian/abilian-core,abilian/abilian-core,abilian/abilian-core,abilian/abilian-core