fix: missing protobuf package, release v0.3.1

[guillaumemichel]

No description provided.

[github-actions]

Suggested version: 0.3.1

Comparing to: v0.3.0 (diff)

Changes in configuration file(s):

(empty)

gorelease says:

# summary
Suggested version: v0.3.1

gocompat says:

HEAD is now at 23cb7f8 release: v0.3.0 (#63)
Switched to branch 'master'
Your branch is up to date with 'origin/master'.

Cutting a Release (and modifying non-markdown files)

This PR is modifying both version.json and non-markdown files.
The Release Checker is not able to analyse files that are not checked in to master. This might cause the above analysis to be inaccurate.
Please consider performing all the code changes in a separate PR before cutting the release.

Automatically created GitHub Release

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It is going to be published when this PR is merged.
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