V5: API changes

[danilowoz]

• Update key name of primaryColor and secondaryColor for something more meaningful, maybe backgroundColor and foregroundColor;
• Revisit width/height keys and if it really necessary to apply on viewBox attr its values;
• When viewBox is set up, the svg is truncated, see fix(native/svg.tsx): svg is truncated when using a ViewBox -react-native #173;
• Check aria-* is used right;
• Rename the key name of uniquekey for something more meaningful, maybe id, or loadingId;
• Remove uncessary keys: preserveAspectRatio, className...
• Name the export of the main component (SVG);
• Reduce bundle as much as it possible;
• Update test (aria);

[danilowoz]

🎉 This PR is included in version 5.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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