Simpler cloudflare

[komuw]

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Now,

What(What have you changed?)

• simplify cloudflare api

Why(Why did you change it?)

[codecov]

Codecov Report

Merging #77 into acmev2 will decrease coverage by 0.23%.
The diff coverage is 87.5%.

@@            Coverage Diff            @@
##           acmev2     #77      +/-   ##
=========================================
- Coverage   93.04%   92.8%   -0.24%     
=========================================
  Files           5       5              
  Lines         388     403      +15     
=========================================
+ Hits          361     374      +13     
- Misses         27      29       +2

Impacted Files	Coverage Δ
sewer/client.py	94.44% <ø> (ø)	⬆️
sewer/dns_providers/cloudflare.py	90.76% <87.5%> (-1.24%)	⬇️