Support for another types of auth tokens (i.e. apikey)

[leotrubach]

No description provided.

[codecov-io]

Codecov Report

Merging #32 into master will decrease coverage by 0.31%.
The diff coverage is 75%.

@@            Coverage Diff             @@
##           master      #32      +/-   ##
==========================================
- Coverage   67.55%   67.24%   -0.32%     
==========================================
  Files           5        5              
  Lines         225      232       +7     
==========================================
+ Hits          152      156       +4     
- Misses         73       76       +3

Impacted Files	Coverage Δ
rest_framework_proxy/views.py	70.42% <75%> (-0.69%)	⬇️

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