chore(deps): bump django from 3.0.5 to 3.0.7 in /back-end (#94)

Bumps [django](https://github.com/django/django) from 3.0.5 to 3.0.7.
- [Release notes](https://github.com/django/django/releases)
- [Commits](django/django@3.0.5...3.0.7)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

back-end/Pipfile

@@ -10,7 +10,7 @@ v = {editable = true,version = "*"}
 
 [packages]
 autopep8 = "~=1.5"
-django = "~=3.0.4"
+django = "~=3.0.7"
 pandas = "~=1.0.1"
 python-dotenv = "~=0.12.0"
 networkx = "~=2.4"