remove dep on fast-text-encoder

[jimmywarting]

You only load this when needed.

google-auth-library-nodejs/package.json

Line 23 in 85f2c93

"fast-text-encoding": "^1.0.0",

But i also see that you have a requirement on NodeJS v12+

google-auth-library-nodejs/package.json

Lines 6 to 8 in 85f2c93

	"engines": {
	"node": ">=12"
	},

therefore this npm package could be removed, cuz text encoder/decoder is available globally since NodeJS v11

Also supporting NodeJS v12 is a bit outdated, think you should target LTS and update to something newer such as v16 that is the current LTS right now

So also think you should do:

 "engines": { 
   "node": ">=16" 
 }, 

[ddelgrosso1]

Thank you for opening an issue @jimmywarting. You are correct both node and most modern browsers now support this and there is likely no reason for us to continue to utilize this as a dependency. However, this would be considered a breaking change so it will have to wait until the next major revision of the library. We are planning to drop Node 12 in the near future and move to Node 14 as the minimum version. The change to remove fast-text-encoding will likely go out at the same time.

[jimmywarting]

any reason for not going with v16 as LTS?
v14 is no longer supported by nodejs

[ddelgrosso1]

There are a variety of issues with jumping from 12->16. We try to look at metrics on what version customers are currently using and a large percentage are still on 14. While we create a new major version when we bump the minimum version, jumping 12->16 is likely to leave a large portion of the user base unable or unwilling to upgrade. Additionally, we try and make sure we are supporting similar versions with other Cloud products, i.e. Cloud Functions.

[sofisl]

Removed in d736da3