Feat/gas config

[kalote]

What kind of change does this PR introduce (bug fix, feature, docs update, ...)?

New gas configuration in the optional params setting:

const config = {
  ipfsGateway: 'https://YOUR-IPFS-GATEWAY/ipfs/',
  gas: 20_000_000, // optional, default is 2_000_000
};

const erc725 = new ERC725(schemas, address, RPC_URL, config);

I also removed the gasPrice from the constants.ts file as it was unused.

What is the current behaviour (you can also link to an open issue here)?

Fix #328

What is the new behaviour (if this is a feature change)?

Other information:

[codecov-commenter]

Codecov Report

Merging #331 (1b1ee16) into develop (122efa9) will increase coverage by 0.67%.
Report is 84 commits behind head on develop.
The diff coverage is 88.88%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

@@             Coverage Diff             @@
##           develop     #331      +/-   ##
===========================================
+ Coverage    83.04%   83.71%   +0.67%     
===========================================
  Files           18       18              
  Lines          979     1130     +151     
  Branches       218      255      +37     
===========================================
+ Hits           813      946     +133     
- Misses          91       98       +7     
- Partials        75       86      +11     

Files	Coverage Δ
src/constants/constants.ts	100.00% <100.00%> (ø)
src/constants/interfaces.ts	100.00% <100.00%> (ø)
src/lib/detector.ts	96.00% <100.00%> (+8.50%)	⬆️
src/lib/getData.ts	89.79% <ø> (ø)
src/lib/provider-wrapper-utils.ts	89.47% <100.00%> (ø)
src/schemas/index.ts	100.00% <100.00%> (ø)
src/types/Method.ts	100.00% <100.00%> (ø)
src/lib/decodeMappingKey.ts	84.21% <60.00%> (-5.54%)	⬇️
src/provider/providerWrapper.ts	81.48% <90.47%> (-1.42%)	⬇️
src/index.ts	75.00% <72.72%> (-2.00%)	⬇️
... and 3 more

... and 4 files with indirect coverage changes

[CJ42]

@kalote you need to checkout the branch from develop ✅ not main ❌
Could you rebase your PR please?

The diffs are not showing properly as a result.

[richtera]

@kalote @CJ42 The ipfsGateway thing will be new with the new IPFS library. I create a token authorized proxy which is compatible with that library but @CallumGrindle had problems using it in nodejs, so it may currently only work in the browser. I am working on it.