Intellisense has issues with class member definitions  #75

I am using the QuickPID library in a project with PlatformIO and VS code on a NodeMCU 32S board. Whenever I try to use any of the class enum keywords intellisense throws a fit that the keyword is not a class member. The project still compiles even with this error, but I hate ignoring the squiggly red underline.

Even the "PID_Basic.ino" example sketch shows this error: "QuickPID::Control::automatic" is not a class memberC/C++(1022)

I am not enough of a C++ programmer to pretend to know how to fix this, but I did see a post that mentioned moving the enums before the class instead of within the class cleared it up.