oauth stub is missing the generateSignature() function

[nir-arad]

Describe the bug
With oauth stub enabled, the function Oauth::generateSignature() is not identified, and when used it is highlighted as an error.

To Reproduce

$oauth = new OAuth($api_key, $api_secret);
$oauth->setToken($access_token, $access_token_secret);
$nonce = mt_rand();
$oauth->setNonce($nonce);
$timestamp = time();
$oauth->setTimestamp($timestamp);
$sig = $oauth->generateSignature('POST', "https://api.twitter.com/1.1/statuses/update.json?status=my%20first%20tweet");

Expected behavior
intelephense should identify this function.

Screenshots
N/A

Platform and version

Version: 1.51.0 (user setup)
Commit: fcac248b077b55bae4ba5bab613fd6e9156c2f0c
Date: 2020-11-05T18:18:23.642Z
Electron: 9.3.3
Chrome: 83.0.4103.122
Node.js: 12.14.1
V8: 8.3.110.13-electron.0
OS: Windows_NT x64 10.0.18363

Intelephense 1.5.4

Used with remote-ssh on a Fedora Core 31 machine:
Linux xxxHOSTNAMExxx 5.8.6-101.fc31.x86_64 #1 SMP Fri Sep 4 04:10:17 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[bmewburn]

Needs a fix upstream at https://github.com/JetBrains/phpstorm-stubs/blob/master/oauth/oauth.php

[nir-arad]

Will you be opening a bug or should I?