[feature] Use PHP Web3

[rennokki]

Closes #20

[codecov]

Codecov Report

Merging #21 (0058c7a) into master (5dc5b45) will decrease coverage by 5.71%.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##              master      #21      +/-   ##
=============================================
- Coverage     100.00%   94.28%   -5.72%     
+ Complexity        16        9       -7     
=============================================
  Files              3        3              
  Lines             52       35      -17     
=============================================
- Hits              52       33      -19     
- Misses             0        2       +2     

Impacted Files	Coverage Δ
src/Web3Facade.php	100.00% <ø> (ø)
src/Web3.php	88.88% <100.00%> (-11.12%)	⬇️

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