fix(deps): update celo packages to v3 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@celo/base (source)	^1.5.2 -> ^3.0.1
@celo/contractkit (source)	^1.5.1 -> ^3.0.1
@celo/utils (source)	^1.5.1 -> ^3.0.1

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[codecov-commenter]

Codecov Report

Merging #132 (174550d) into main (bf45b8c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #132   +/-   ##
=======================================
  Coverage   87.23%   87.23%           
=======================================
  Files           4        4           
  Lines          47       47           
  Branches        7        7           
=======================================
  Hits           41       41           
  Misses          6        6           

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