v0.1.21: Update dependency: deps/k_release (#29)
* deps/k_release: Set Version 7.1.86
* Set Version: 0.1.20
* pyproject.toml: sync pyk version 7.1.86
* deps/k_release: Set Version 7.1.87
* pyproject.toml: sync pyk version 7.1.87
* deps/k_release: Set Version 7.1.88
* pyproject.toml: sync pyk version 7.1.88
* deps/k_release: Set Version 7.1.89
* pyproject.toml: sync pyk version 7.1.89
* deps/k_release: Set Version 7.1.90
* Set Version: 0.1.21
* pyproject.toml: sync pyk version 7.1.90
* deps/k_release: Set Version 7.1.92
* pyproject.toml: sync pyk version 7.1.92
---------
Co-authored-by: devops <devops@runtimeverification.com>