update to python3.7, update dependencies and fix obvious update issues

src/requirements/opengl.txt

@@ -1 +1 @@
-ModernGL>=4.2,<4.3
+ModernGL>=5.4,<5.5

src/requirements/production.txt

@@ -1,16 +1,16 @@
-Django>=1.11,<1.12
-django-bootstrap3>=8.2,<8.3
-django-compressor==2.1
+Django>=2.1,<2.2
+django-bootstrap3>=11.0,<11.1
+django-compressor==2.2
 csscompressor
-djangorestframework>=3.6,<3.7
-django-filter>=1.0,<1.1
-shapely>=1.5,<1.6
-MeshPy>=2016.1,<2016.2
+djangorestframework>=3.8,<3.9
+django-filter>=2.0,<2.1
+shapely>=1.6,<1.7
+-e git://github.com/c3nav/meshpy#egg=MeshPy
 rtree>=0.8,<0.9
-celery>=4.0,<4.1
-requests>=2.17,<2.18
-Pillow>=4.1,<4.2
-qrcode>=5.3,<5.4
-matplotlib>=2.0,<2.1
-scipy>=0.19,<0.20
+celery>=4.2,<4.3
+requests>=2.19,<2.20
+Pillow>=5.2,<5.3
+qrcode>=6.0,<6.1
+matplotlib>=2.2,<2.3
+scipy>=1.1,<1.2
 django_libsass>=0.7,<0.8

src/requirements/redis.txt

@@ -1,2 +1,2 @@
-django-redis>=4.8,<4.9
+django-redis>=4.9,<4.10
 redis>=2.10,<2.11

src/requirements/rsvg.txt

@@ -1,2 +1,2 @@
-pgi==0.0.11.1
-cairocffi>=0.8,<0.9
+pgi==0.0.11.2
+cairocffi>=0.9,<0.10