Incomplete multi-character sanitization on utils.js getQueryParam function

[JiatangDong]

Our company enforced a CodeQL scan against our built bundle. And an incomplete multi-character sanitization error is reported from this line

mixpanel-js/src/utils.js

Line 965 in 93df8eb

param = param.replace(/[[]/, '\\[').replace(/[\]]/, '\\]');

This should be easily fixed by adding a 'g' in regex

param = param.replace(/[[]/g, '\\[').replace(/[\]]/g, '\\]');

[tdumitrescu]

Thanks for the heads up. This should be fixed in release v2.55.1.