[in-review] Code optimisations via adding the credo · elixirkoans/elixir-koans@ca3e758

The following actions uses node12 which is deprecated and will be forced to run on node16: actions/checkout@v2, erlef/setup-beam@988e02bfe678367a02564f65ca2e37726dc0268f, actions/cache@v2. For more info: https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

variable "individual_digits" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "number" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "string_digit" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "first" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "last" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "range" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "dancer" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "musician" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "painter" is unused (if the variable is not meant to be used, prefix it with an underscore)

variable "person_with_hobby" is unused (if the variable is not meant to be used, prefix it with an underscore)

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

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