Add missing def_delegator for constructor_inputs

[beacoding]

constructor_inputs when creating a contract from_file was missing.

We should probably enable passing constructor params with something like this:

    def encode_constructor_params(contract, args)
      types = contract.constructor_inputs.map { |input| input.type }
      Util.bin_to_hex(Eth::Abi.encode(types, args))
    end

as well, and appending it to data in deploy and transact.

Be happy to extend this PR if that's a direction we'd want to go.

[kurotaky]

It was missing during implementation. Thank you!

[q9f]

Be happy to extend this PR if that's a direction we'd want to go.

Please do if you are on it already! :)

[codecov-commenter]

Codecov Report

Merging #96 (41f5838) into main (854a7bc) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #96   +/-   ##
=======================================
  Coverage   99.73%   99.73%           
=======================================
  Files          67       67           
  Lines        3801     3802    +1     
=======================================
+ Hits         3791     3792    +1     
  Misses         10       10           

Impacted Files	Coverage Δ
lib/eth/contract.rb	100.00% <100.00%> (ø)

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[beacoding]

great! Feel free to merge this -- I'll file a separate PR for enabling constructor params @q9f / @kurotaky