intelliSenseEngine doesn't work as default

[IQ-raf]

having "C_Cpp.intelliSenseEngine": "Tag Parser" makes the C/C+ extension not work properly. For example, I can write a line without a semicolon at the end and it won't throw me an error until I compile. and another example is the autocomplete from a class will also list me every single method from every file included instead of just the ones from this class.

Unfortunately, I need "C_Cpp.intelliSenseEngine": "Tag Parser" so that vsc doesn't throw an error for every file I include (and Arduino methods such as Serial).

It would be great if this extension worked with "C_Cpp.intelliSenseEngine": set to"default'`

[adiazulay]

Tracking this with #438