Make HMMBase optional in the test suite (#111) · gdalle/HiddenMarkovModels.jl@284189f

removing `stable` and linking `stable` to `v0.5.3`.

removing `v0.5` and linking `v0.5` to `v0.5.3`.

removing `v0.4` and linking `v0.4` to `v0.4.1`.

removing `v0.3` and linking `v0.3` to `v0.3.1`.

removing `v0.2` and linking `v0.2` to `v0.2.2`.

removing `v0.1` and linking `v0.1` to `v0.1.0`.

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

The following actions use a deprecated Node.js version and will be forced to run on node20: actions/checkout@v2, julia-actions/setup-julia@v1. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/

Consider using `julia-actions/cache` to speed up runs https://github.com/julia-actions/cache. To ignore, set input `ignore-no-cache: true`

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