Caesar cipher CLI tool

• Description: https://github.com/rolling-scopes-school/basic-nodejs-2021Q2/blob/master/descriptions/caesar-cipher-cli-tool.md
• Cross-check criteria: https://github.com/rolling-scopes-school/basic-nodejs-2021Q2/blob/master/cross-check/caesar-cipher-cli-tool.md

Developer: Jalolov Sultonali

• Sulton-Ali (github)
• @JSS_9377 (telegram)
• Sultonali#5739