Update to more recent libraries

- Specify exact module versions

InvenTree/company/models.py

@@ -17,7 +17,7 @@ from django.db.models import Sum
 from django.apps import apps
 from django.urls import reverse
 from django.conf import settings
-from django.contrib.staticfiles.templatetags.staticfiles import static
+from django.conf.urls.static import static
 
 from InvenTree.fields import InvenTreeURLField
 from InvenTree.status_codes import OrderStatus

InvenTree/part/models.py

@@ -18,7 +18,7 @@ from django.db.models import Sum
 from django.db.models import prefetch_related_objects
 from django.core.validators import MinValueValidator
 
-from django.contrib.staticfiles.templatetags.staticfiles import static
+from django.conf.urls.static import static
 from django.contrib.auth.models import User
 from django.db.models.signals import pre_delete
 from django.dispatch import receiver

requirements.txt

@@ -1,17 +1,17 @@
-Django==2.2.4                   # Django package
+Django==2.2.8                   # Django package
 pillow==5.0.0                   # Image manipulation
-djangorestframework==3.6.2      # DRF framework
-django-cors-headers==2.5.3      # CORS headers extension for DRF
-django_filter==1.0.2            # Extended filtering options
+djangorestframework==3.10.3     # DRF framework
+django-cors-headers==3.2.0      # CORS headers extension for DRF
+django_filter==2.2.0            # Extended filtering options
 django-mptt==0.10.0             # Modified Preorder Tree Traversal
 django-dbbackup==3.2.0          # Database backup / restore functionality
 coreapi==2.3.0                  # API documentation
 pygments==2.2.0                 # Syntax highlighting
 tablib==0.13.0                  # Import / export data files
-django-crispy-forms==1.7.2      # Form helpers
-django-import-export==1.0.0     # Data import / export for admin interface
-django-cleanup==2.1.0           # Manage deletion of old / unused uploaded files
-django-qr-code==1.0.0           # Generate QR codes
+django-crispy-forms==1.8.1      # Form helpers
+django-import-export==2.0.0     # Data import / export for admin interface
+django-cleanup==4.0.0           # Manage deletion of old / unused uploaded files
+django-qr-code==1.1.0           # Generate QR codes
 flake8==3.3.0                   # PEP checking
 coverage==4.0.3                 # Unit test coverage
 python-coveralls==2.9.1         # Coveralls linking (for Travis)