[Requirements] Update web browsers requirements for iTowns #2252
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Description
This PR updates and formalizes the web browser requirements for iTowns.
See proposal #2256.
Motivation and Context
We are currently using babel's preset-env plugin to decide which syntax transforms and polyfills are used during the transpilation step. However, we do not set an output target in its configuration which causes
This PR aims to:
Removing unnecessary polyfills for modules well-supported by our target is the object of the follow-up PR #2248