Remove restriction on amplitude-js version

[gugu]

NPM v7 currently returns this error on installation:

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: [email protected]
npm ERR! Found: [email protected]
npm ERR! node_modules/amplitude-js
npm ERR!   amplitude-js@"^7.4.1" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer amplitude-js@"^4.1.0" from @redux-beacon/[email protected]
npm ERR! node_modules/@redux-beacon/amplitude
npm ERR!   @redux-beacon/amplitude@"^1.0.3" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR! See /home/kostenko/.npm/eresolve-report.txt for a full report.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/kostenko/.npm/_logs/2021-08-15T09_55_07_290Z-debug.log

I don't think there is a need a strict version check for amplitude-js version

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