updated npm links

Author: nitish24p

README.md

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 <img src="./art/art.png" alt="My cool logo"/>
-[react-native-upi](https://github.com/nitish24p/react-native-upi/tree/master/lib) is a tiny plugin to integrate the UPI payment interface made by [NPCI](https://www.bhimupi.org.in/) from your react native apps. This plugin allows you to enable peer to peer payments via UPI in your react native apps. Linking specs have been followed as per [this](https://www.npci.org.in/sites/all/themes/npcl/images/PDF/UPI_Linking_Specs_ver_1.5.1.pdf) doc
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+[react-native-upi](https://www.npmjs.com/package/react-native-upi-payment) is a tiny plugin to integrate the UPI payment interface made by [NPCI](https://www.bhimupi.org.in/) from your react native apps. This plugin allows you to enable peer to peer payments via UPI in your react native apps. Linking specs have been followed as per [this](https://www.npci.org.in/sites/all/themes/npcl/images/PDF/UPI_Linking_Specs_ver_1.5.1.pdf) doc
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 ## Installation