8 response decoder called if no content type is present

[othercodes]

Now the decoders check the presence of the content-type header and the body.

[codecov]

Codecov Report

Merging #9 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master       #9      +/-   ##
============================================
- Coverage     63.56%   63.48%   -0.09%     
- Complexity      143      147       +4     
============================================
  Files            15       15              
  Lines           409      419      +10     
============================================
+ Hits            260      266       +6     
- Misses          149      153       +4

Impacted Files	Coverage Δ	Complexity Δ
src/Payloads/Headers.php	84% <100%> (-9.19%)	18 <2> (+2)
src/Payloads/Response.php	82.35% <100%> (ø)	11 <0> (ø)	⬇️
src/Modules/Decoders/BaseDecoder.php	76.92% <100%> (+10.25%)	6 <0> (+2)	⬆️
src/Modules/BaseModule.php	75% <0%> (+6.25%)	7% <0%> (ø)	⬇️

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