add functions that were removed in werkszeug.

[christopherpickering]

for #165

[codecov-commenter]

Codecov Report

Merging #166 (488cf5d) into master (7d3224f) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #166      +/-   ##
==========================================
+ Coverage   94.31%   94.43%   +0.11%     
==========================================
  Files           6        6              
  Lines         387      395       +8     
==========================================
+ Hits          365      373       +8     
  Misses         22       22              

Impacted Files	Coverage Δ
flask_apscheduler/auth.py	89.58% <100.00%> (+2.08%)	⬆️

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