Add example script showing how to run a command with several modifiers.

[simonprickett]

Add an example script that shows how to run a command with several modifiers. Use the SET command twice as follows:

127.0.0.1:6379> set mykey myvalue ex 60 get
(nil)
127.0.0.1:6379> set mykey newvalue ex 60 get
"myvalue"

Pay attention to the guidelines for adding an example here when doing this. Name your file command-with-modifiers.js or .ts if using TypeScript, and your function commandWithModifiers.

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[rohan201]

I would like to work on this issue, can you pls assign me

[simonprickett]

@rohan201 yes, thanks! Please be sure to check out the README in the examples folder, and use Node Redis 4 (npm install redis@next) - see package.json in the examples folder.