Bump Go to 1.18

[vcastellm]

Description

Bumping Go version to 1.18

• Extra bumping goreleaser/cross to official image.

Changes include

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the relevant labels
• I have updated the official documentation
• I have added sufficient documentation in code

Testing

• I have tested this code with the official test suite
• I have tested this code manually

Manual tests

Just run cluster multiple times

Documentation update

https://github.com/maticnetwork/matic-docs/pull/1117
https://wiki.polygon.technology/docs/edge/get-started/installation/#using-go-install

[codecov]

Codecov Report

Merging #776 (13d64c1) into develop (ae056ef) will increase coverage by 0.13%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop     #776      +/-   ##
===========================================
+ Coverage    52.72%   52.85%   +0.13%     
===========================================
  Files          130      130              
  Lines        17147    17146       -1     
===========================================
+ Hits          9040     9062      +22     
+ Misses        7460     7439      -21     
+ Partials       647      645       -2     

Impacted Files	Coverage Δ
jsonrpc/eth_endpoint.go	71.45% <100.00%> (-0.05%)	⬇️
jsonrpc/filter_manager.go	77.17% <100.00%> (+0.20%)	⬆️
network/server_discovery.go	89.80% <0.00%> (+14.01%)	⬆️

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[epikichi]

Can we possibly run a go mod tidy to get that taken care of as well?

[zivkovicmilos]

🚀