TypeScript: Support type arguments on tagged templates (#7754)

| Q                        | A
| ------------------------ | ---
| Fixed Issues?            | #7747 (partly)
| Patch: Bug Fix?          | 
| Major: Breaking Change?  | 
| Minor: New Feature?      | Yes
| Tests Added + Pass?      | Yes
| Documentation PR         |
| Any Dependency Changes?  |
| License                  | MIT

@JamesHenry This changes the AST format. CC @DanielRosenwasser for review.
Supports parsing type arguments on tagged template calls.
Should wait on Microsoft/TypeScript#23430 to be merged so we're sure we have the final syntax.

packages/babel-generator/src/generators/template-literals.js

@@ -1,5 +1,6 @@
 export function TaggedTemplateExpression(node: Object) {
   this.print(node.tag, node);
+  this.print(node.typeParameters, node); // TS
   this.print(node.quasi, node);
 }