polyfill padStart/padEnd in mobile Safari

[gulping]

summary

#280
padStart/padEnd is buggy in some versions of Safari.
polyfill of core-js is available in the desktop Safari.
I encountered the bug in the mobile Safari so please polyfill in the mobile too.

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I just encountered the bug.
I'll try to refine the reproductive environment and working example when you request.

I'm using core-js via babel.

iOS version

It happens in iOS 10.2.1,
It doesn't happen in iOS 8.x, 9.x, 10.3.x, 11.x,
(as far as I tested)

situation when I encountered it

fetch serial zero-padded number files.

// pseudo code
[0, 1, 2, ...].forEach( number => {
  const padded = `${number}`.padStart(4, "0"); // "0000", "0001", ...
  fetch(`https://..../${padded}.json`).then(do some processes);
});

This runs successfully.
But run about 20+ fetches in parallel, padStart returns buggy result("null0", "null1", ...).

workaround

I read #280,
and I thought that the RegExp test
/Version\/10\.\d+(\.\d+)? Safari\//
only matches to desktop Safari.

the example of userAgent of mobile Safari
Mozilla/5.0 (iPhone; CPU iPhone OS 10_2_1 like Mac OS X) AppleWebKit/602.4.6 (KHTML, like Gecko) Version/10.0 Mobile/14D27 Safari/602.1

So I just added .* as workaround.
/Version\/10\.\d+(\.\d+)?.* Safari\//
And it runs successfully.

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so it seems to fix when polyfill in the mobile too.