go-coap Upgrade dependencies

Direct: github.com/pion/dtls/v3 v3.0.6 golang.org/x/exp v0.0.0-20240904232852-e7e105dedf7e golang.org/x/net v0.35.0 golang.org/x/sync v0.11.0

Indirect:

github.com/pion/logging v0.2.3 golang.org/x/crypto v0.33.0 golang.org/x/sys v0.30.0

Summary by CodeRabbit

Chores
- Updated linting workflow and configuration to use newer tools and modernized settings.
- Upgraded several dependencies to newer versions for improved compatibility and stability.
Refactor
- Cleaned up code by removing unused variables, simplifying struct definitions, and improving variable naming consistency in example files.
- Adjusted function signatures and parameter usage for clarity and to avoid unused variables.
- Improved import organization and code formatting in various example files.

May 08 '25 16:05 Danielius1922

Walkthrough

This update modernizes the project’s linting and dependency management. The GitHub Actions workflow for golangci-lint is upgraded to v8, and the .golangci.yml configuration is restructured to version 2 format. Several Go module dependencies are updated, and minor code cleanups are applied across example files for clarity and consistency.

Changes

File(s)	Change Summary
.github/workflows/golangci-lint.yml	Upgraded golangci-lint GitHub Action from v6 to v8.
.golangci.yml	Restructured configuration to version 2, reorganized keys, updated exclusions, enabled formatters, and modernized settings.
go.mod	Updated multiple dependencies to newer versions; added replace directives for Go 1.20 compatibility.
examples/dtls/cid/server/main.go	Removed atomic import and `closed` field from struct; ignored unused parameter in callback.
examples/dtls/pki/cert_util.go	Removed redundant nil assignment before returning error in certificate pool loading.
examples/mcast/client/main.go	Replaced unused variables with `_` in callbacks; minor comment formatting adjustments.
examples/mcast/server/main.go	Changed error variable assignment to avoid redeclaration inside loop.
examples/options/server/main.go	Consolidated import, renamed `clientId` to `clientID` for consistency.
examples/simple/server/main.go	Updated function signature to ignore unused request parameter.
pkg/cache/cache.go	Replaced direct embedded field method calls with receiver method calls.

Sequence Diagram(s)

sequenceDiagram
    participant Developer
    participant GitHub Actions
    participant golangci-lint
    Developer ->> GitHub Actions: Push code / PR
    GitHub Actions ->> golangci-lint (v8): Run lint checks with new config
    golangci-lint -->> GitHub Actions: Report results
    GitHub Actions -->> Developer: Display lint results

Possibly related PRs

plgd-dev/go-coap#559: Updates golangci-lint workflow and configuration, similar to this PR’s linting modernization.
plgd-dev/go-coap#562: Upgrades Go module dependencies, overlapping with this PR’s dependency updates.
plgd-dev/go-coap#580: Updates golang.org/x/exp and golang.org/x/net dependencies, directly related to this PR’s module changes.

Poem

A rabbit hops through fields of code,
Tidying imports, lightening the load.
Linters refreshed, dependencies new,
Old warnings vanish, the sky turns blue.
With every hop, the project’s bright—
Clean and modern, running right!
🐇✨

[!WARNING] There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure.

🔧 golangci-lint (1.64.8)

Error: you are using a configuration file for golangci-lint v2 with golangci-lint v1: please use golangci-lint v2 Failed executing command with error: you are using a configuration file for golangci-lint v2 with golangci-lint v1: please use golangci-lint v2

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May 08 '25 16:05 coderabbitai[bot]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.26%. Comparing base (71407da) to head (58e5579).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #606      +/-   ##
==========================================
- Coverage   73.31%   73.26%   -0.06%     
==========================================
  Files          73       73              
  Lines        6986     6986              
==========================================
- Hits         5122     5118       -4     
- Misses       1482     1485       +3     
- Partials      382      383       +1

:umbrella: View full report in Codecov by Sentry.
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