Update README.md

Author: BryantWelch

README.md

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 # Spreadsheet Wrangler
 
-[![Version](https://img.shields.io/badge/version-1.7.0-blue.svg)](https://github.com/BryantWelch/Spreadsheet-Wrangler/releases/tag/v1.7.0)
+[![Version](https://img.shields.io/badge/version-1.8.0-blue.svg)](https://github.com/BryantWelch/Spreadsheet-Wrangler/releases/tag/v1.8.0)
 [![PowerShell](https://img.shields.io/badge/PowerShell-5.1+-5391FE.svg)](https://github.com/PowerShell/PowerShell)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Platform](https://img.shields.io/badge/platform-Windows-lightgrey.svg)](https://www.microsoft.com/en-us/windows)