Update NPM package for 1.600

[guidoferreyra]

The npm package needs to be updated to 1.600 and also include the italic font files, currently only roman are being used and VFs using a different file name, it will be simpler if this aligns with the otput from the build process.

cc @skullface

[dinhquochan]

hi @skullface, could you please tag 1.600?

[guidoferreyra]

@ZeeJab could you please take a look to this? This is blocking on making the release that includes the Vietnamese extension.

[skullface]

Working on it today, thanks for your patience!

[hiepxanh]

yes, I think the npm still not update to 1.6.0 version