Replace Flask-Cache with Flask-Caching.

Flask-Cache is unmaintained, cf. https://github.com/thadeusb/flask-cache/issues/167

ffdnispdb/__init__.py

@@ -4,7 +4,7 @@ from flask import Flask, g, current_app, request
 from flask_babel import Babel
 from flask_sqlalchemy import SQLAlchemy, event
 from flask_mail import Mail
-from flask_cache import Cache
+from flask_caching import Cache
 from .sessions import MySessionInterface
 
 

requirements.txt

@@ -4,7 +4,7 @@ Flask-Babel>0.9
 Flask-SQLAlchemy>=1.0
 Flask-WTF>0.9.4
 Flask-Mail>0.9.0
-Flask-Cache>0.12
+Flask-Caching>1.3
 wtforms>2.0
 Jinja2>2.7.1
 MarkupSafe>0.18