Merge pull request #49 from hackersandslackers/renovate/flask-wtf-0.x

Update dependency flask-wtf to v0.15.1

requirements.txt

@@ -1,7 +1,7 @@
 click==7.1.2; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
 dnspython==2.1.0; python_version >= "3.6"
 email-validator==1.1.2
-flask-wtf==0.14.3
+flask-wtf==0.15.1
 flask==1.1.2; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0")
 idna==3.1; python_version >= "3.4"
 itsdangerous==1.1.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"