Update requirement versions and removals

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -250,6 +250,9 @@
   difference is determined by the URL query. A ?q= means a 
   simple search. For advanced search pass the search model
   fields in the URL query, example: ?q=document_type__label=
+- Remove django-mathfilters from requirements. These tags
+  are provided by default by Jinja2 template engine
+  (http://jinja.pocoo.org/docs/2.10/templates/#math).
 
 3.1.9 (2018-11-01)
 ==================

removals.txt

@@ -1,10 +1,10 @@
 # Packages to be remove during upgrades
 cssmin
 django-autoadmin
-django-celery
 django-compressor
 django-environ
 django-filetransfers
+django-mathfilters
 django-rest-swagger
 django-suit
 pathlib

requirements/base.txt

@@ -1,10 +1,9 @@
-Pillow==5.3.0
+Pillow==5.4.1
 PyYAML==3.13
 
 celery==4.1.1
 
 django-activity-stream==0.6.5
-django-autoadmin==1.1.1
 django-celery==3.2.2
 django-colorful==1.3
 django-cors-headers==2.4.0
@@ -18,9 +17,9 @@ django-qsstats-magic==1.0.0
 django-solo==1.1.3
 django-stronghold==0.3.0
 django-widget-tweaks==1.4.3
-djangorestframework==3.7.7
+djangorestframework==3.9.2
 djangorestframework-recursive==0.1.2
-drf-yasg==1.5.0
+drf-yasg==1.12.1
 
 flanker==0.9.0
 flex==6.13.2
@@ -37,10 +36,10 @@ mock==2.0.0
 
 node-semver==0.5.1
 
-pathlib2==2.3.2
+pathlib2==2.3.3
 pycountry==18.5.26
 PyPDF2==1.26.0
-pyocr==0.5.3
+pyocr==0.6
 python-dateutil==2.7.5
 python-gnupg==0.3.9
 python-magic==0.4.15
@@ -51,4 +50,4 @@ requests==2.20.1
 sh==1.12.14
 swagger-spec-validator==2.4.1
 
-whitenoise==4.1.1
+whitenoise==4.1.2