Upgraded dependencies to fix problem with Flask-Script

- Flask-Script 2.0.5 → 2.0.6

Along with this came:

- Flask      0.12    → 0.12.2
- Werkzeug   0.11.15 → 0.12.2
- MarkupSafe 0.23    → 1.0

requirements.txt

@@ -10,16 +10,16 @@ bleach==1.4.3
 celery[redis]==4.0.2
 CommonMark==0.7.2
 Eve==0.7.3
-Flask==0.12
+Flask==0.12.2
 Flask-Babel==0.11.2
 Flask-Cache==0.13.1
-Flask-Script==2.0.5
+Flask-Script==2.0.6
 Flask-Login==0.3.2
 Flask-WTF==0.12
 gcloud==0.12.0
 google-apitools==0.4.11
 httplib2==0.9.2
-MarkupSafe==0.23
+MarkupSafe==1.0
 ndg-httpsclient==0.4.0
 Pillow==4.1.1
 python-dateutil==2.5.3
@@ -55,4 +55,4 @@ simplejson==3.10.0
 six==1.10.0
 vine==1.1.3
 WTForms==2.1
-Werkzeug==0.11.15
+Werkzeug==0.12.2