Refresh oauth20 helper

[mironal]

134

Example

client.refreshOAuth20Token(type: .publicClient) { result in
    switch result {
        case .succes(let refresh):
            if refresh.refreshed {
                // If necessary, we will handle the saving process, etc.
                // storeToken(oauth20: refresh.token)
            }
    }
}

let refresh = try await client.refreshOAuth20Token(type: .publicClient, forceRefresh: false)
if refresh.refreshed {
    // If necessary, we will handle the saving process, etc.
    // storeToken(oauth20: refresh.token)
}

[codecov-commenter]

Codecov Report

Merging #138 (b2b236e) into main (70a3c7d) will decrease coverage by 0.04%. The diff coverage is 63.09%.

@@            Coverage Diff             @@
##             main     #138      +/-   ##
==========================================
- Coverage   80.29%   80.24%   -0.05%     
==========================================
  Files         256      256              
  Lines        6895     6979      +84     
==========================================
+ Hits         5536     5600      +64     
- Misses       1359     1379      +20     

Impacted Files	Coverage Δ
Sources/TwitterAPIKit/TwitterAPIKitError.swift	28.64% <0.00%> (-4.69%)	:arrow_down:
Sources/TwitterAPIKit/TwitterAPISession.swift	68.88% <66.66%> (-0.16%)	:arrow_down:
Sources/TwitterAPIKit/TwitterAPIClient.swift	83.49% <95.45%> (+14.00%)	:arrow_up:
Sources/TwitterAPIKit/Extensions/Concurrency.swift	100.00% <100.00%> (ø)
Sources/TwitterAPIKit/AuthAPI/OAuth20API.swift	25.00% <0.00%> (+18.18%)	:arrow_up:

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[mironal]

135