The SplitButton type declarations are missing the "show" and "hide" methods

[dchenk]

I'm submitting a ...

[X] bug report
[ ] feature request
[ ] support request => Please do not submit support request here, instead see https://forum.primefaces.org/viewforum.php?f=57

Current behavior

The TypeScript declaration file for the SplitButton does not list "show" and "hide" as methods even though they are defined. This prevents programmatic opening/closing of the menu.

Expected behavior

The SplitButton should have the (already implemented) show and hide methods listed in the type declaration in the file components/lib/splitbutton/SplitButton.d.ts.

Please tell us about your environment:
N/A

• React version:
  N/A

• PrimeReact version:
  7.2.0

• Browser:
  N/A

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  N/A

[melloware]

Much appreciated for submitting the PR as well.