feat: COLO switchover updates

[mattpodolak]

Summary of Changes

• PR for v3.0.0 release including minor tweaks from COLO switch over
• Read about the API changes here

[codecov]

Codecov Report

Base: 86.87% // Head: 84.14% // Decreases project coverage by -2.73% ⚠️

Coverage data is based on head (fb7c378) compared to base (540a67f).
Patch coverage: 83.65% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #52      +/-   ##
==========================================
- Coverage   86.87%   84.14%   -2.74%     
==========================================
  Files           8       10       +2     
  Lines         564      599      +35     
==========================================
+ Hits          490      504      +14     
- Misses         74       95      +21     

Impacted Files	Coverage Δ
pmaw/RateLimit.py	64.17% <38.46%> (ø)
pmaw/Cache.py	76.66% <58.33%> (-13.34%)	⬇️
pmaw/Response.py	79.54% <66.66%> (-20.46%)	⬇️
pmaw/Request.py	83.24% <79.10%> (-2.02%)	⬇️
pmaw/PushshiftAPI.py	92.30% <83.33%> (-7.70%)	⬇️
pmaw/PushshiftAPIBase.py	91.66% <92.72%> (+1.07%)	⬆️
pmaw/Metadata.py	97.05% <97.05%> (ø)
pmaw/types/exceptions.py	100.00% <100.00%> (ø)
pmaw/utils/filter.py	100.00% <100.00%> (ø)
pmaw/utils/slices.py	100.00% <100.00%> (ø)
... and 4 more

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