Add ie support

[igoroctaviano]

Update Babel configuration for IE 11 compatibility

-Request: Target IE 11 #35

Description

Updates the Babel configuration to align with other dcmjs-org libraries by providing an IE 11 compatible build out of the box. This change will make the package easier to use as a dependency since consumers targeting IE 11 won't need to transpile this dependency on every build.

Changes

• Removed node: 'current' target as it's not necessary (Jest tests work fine without it)
• Removed redundant @babel/plugin-proposal-object-rest-spread plugin since it's included in @babel/preset-env by default
• Simplified configuration to target IE 11 browsers, matching the approach used in other dcmjs-org repositories

Notes

• This configuration ensures compatibility with IE 11 while maintaining support for all modern browsers
• The simplified configuration follows the pattern established in other dcmjs-org libraries (e.g., dcmjs)
• No functional changes to the codebase, only build configuration updates

Related

Follows the pattern from: https://github.com/dcmjs-org/dcmjs/blob/master/.babelrc