Add mixpanel to req

requirements.txt

@@ -1,24 +1,25 @@
 # Python-3.6
-gunicorn==19.7.1
+arrow==0.12.1
-requests==2.18.4
+celery[redis]==4.1.0
 Django==2.0.3
-django-anymail[mailgun]==2.0
-# paymentwall-python==1.0.7
-git+https://github.com/ivlevdenis/paymentwall-python.git
-twilio==6.10.5
-psycopg2-binary==2.7.4
-facepy==1.0.9
-Pillow==5.0.0
 django-active-link==0.1.2
-arrow==0.12.1
+django-anymail[mailgun]==2.0
+django-cors-headers==2.2.0
+django-constance[database]==2.1.0
 django-filter==2.0.0.dev1
 django-mptt==0.9.0
+django-silk==2.0.0
 django-polymorphic-tree==1.5
-celery[redis]==4.1.0
 djangorestframework==3.7.7
 drf-yasg[validation]==1.5.0
-django-silk==2.0.0
+facepy==1.0.9
-django-cors-headers==2.2.0
+gunicorn==19.7.1
-django-constance[database]==2.1.0
+mixpanel==4.3.2
+requests==2.18.4
+psycopg2-binary==2.7.4
+Pillow==5.0.0
+twilio==6.10.5
+# paymentwall-python==1.0.7
+git+https://github.com/ivlevdenis/paymentwall-python.git
 # python-instagram==1.3.2
 git+https://github.com/ivlevdenis/python-instagram.git