ParseObject.startsWith & endsWith cannot be use in a case-insensitive way

[sadortun]

Is your feature request related to a problem? Please describe.
Our MongoDB use a collation/strength that allows for case-insensitive queries/indexes

Unfortunatly ParseObject.startsWith() and ParseObject.endssWith() use a $regex that is case-sensitive.

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Considering that matches() already allow modifiers, would you consider adding a 2nd parameter to startsWith/endsWith to allow case-insensitive regex ?

matches(key, regex , modifiers) 
   //....
    if (regex.ignoreCase) {
      modifiers += 'i';
    }

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

// Currently using instead
q.matches('name', '^' +value, 'i')

//But it would be nice to ...
q.startsWith('name', value, 'i')

Additional context
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LMK and i can submit a PR later this week