Fix highlighting of function calls with Flow type args

[mroch]

In Flow, you can call a function an explicitly specify the types for the generics. For example

function foo<A, B>(a: A, b: B): void {}

foo<string, number>("hello", 123);

This PR attempts to update vscode-language-babel to support this syntax. It's a little complicated, since the grammar is somewhat ambiguous. For example, foo < bar > (123) is a valid expression in JavaScript, but Flow interprets it as a call expression with type parameters.

Fixes #43
Similar to gandm/language-babel#527, but adds meta.method-call.*

[michaelgmcd]

Wow, this looks great. I'll take a closer look sometime before Sunday and test a few things. Excited to merge this.

[rattrayalex-stripe]

Awesome to see investment in community tooling like this, thank you @mroch !

[valscion]

This is amazing! Thank you all for making this happen 💞

Any chance on getting a new release out soonish? 😅

[michaelgmcd]

Released in v0.0.24. Let me know if you run into any issues.