CircleCI YAML configuration file parser

CLI tool that accepts a file path to a CircleCI YAML configuration file and outputs a list of images used in it.

Requirements:

Read input a file path from Stdin
- without quotes
- with quotes
- with spaces
Support CircleCI configuration file
- Version
  - v2.1 - Cloud, Server 3
  - v2.0 - Server 2
- File formats - YAML, YML
Output a list of images from the configuration file to Stdout
- Sorted by <image name>:<version TAG>
  - <image name>
    - ascending alphabetical order
  - <version TAG>
    - descending sort
    - current and latest on top
    - numeric above
- Every image from a new line
Log errors return to Stderr when
- file path is not provided
- file path is not found
- image in file is not found

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