Fixing django vulnerabilities and dropping support to Python 3.3

[marycaroline]

Fixed found vulnerabilities

Motivation and Context

• Fixed 2 vulnerabilities found in requirements
• Drop support to Python 3.3

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.

[victorcarrico]

@MaryCaroline Tests are failing. :thinking:

[codecov-io]

Codecov Report

Merging #19 into master will not change coverage. The diff coverage is 100%.

@@          Coverage Diff           @@
##           master     #19   +/-   ##
======================================
  Coverage    94.3%   94.3%           
======================================
  Files          10      10           
  Lines         246     246           
  Branches       14      14           
======================================
  Hits          232     232           
  Misses         13      13           
  Partials        1       1

Impacted Files	Coverage Δ
knowledge_share/__init__.py	100% <100%> (ø)	:arrow_up:

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