Better way to create payload

[codecov[bot]]

Codecov Report

Merging #14 (98db73d) into main (16642f9) will decrease coverage by 0.03%. The diff coverage is 81.81%.

@@             Coverage Diff              @@
##               main      #14      +/-   ##
============================================
- Coverage     84.09%   84.06%   -0.03%     
- Complexity      305      310       +5     
============================================
  Files            32       35       +3     
  Lines           704      709       +5     
============================================
+ Hits            592      596       +4     
- Misses          112      113       +1     

Impacted Files	Coverage Δ
src/Body/AsText.php	0.00% <0.00%> (ø)
src/Body/AsJson.php	100.00% <100.00%> (ø)
src/Body/AsMultipart.php	100.00% <100.00%> (ø)
src/Request.php	100.00% <100.00%> (+3.03%)	:arrow_up:

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