Add TS support to @babel/parser's Scope (#9766)

* [parser] Allow plugins to extend ScopeHandler

* Directly extend Scope

* Don't use new.target to get the ScopeHandler

* [parser] Add TS enum  support to the Scope

* Remove duplicated options in tests

* Fix

* Fix flow

* Rename tests

* Add tests

* Full typescript support in scope

* Remove BIND_SIMPLE_CATCH

SCOPE_SIMPLE_CATCH was used instead

* Export TS types

* Register function declarations

* Fix body-less functions and namespaces

1) Move this.scope.exit() for functions from parseFunctionBody to the callers.
    Otherwise the scope of body-less functions was never closed.
    Also, it is easier to track scope.exit() if it is near to scope.enter()
2) Register namespace ids for export

* Disallow redeclaration of enum with const enum

packages/babel-parser/src/parser/expression.js

@@ -1767,6 +1767,7 @@ export default class ExpressionParser extends LValParser {
     this.parseFunctionParams((node: any), allowModifiers);
     this.checkYieldAwaitInDefaultParams();
     this.parseFunctionBodyAndFinish(node, type, true);
+    this.scope.exit();
 
     this.state.yieldPos = oldYieldPos;
     this.state.awaitPos = oldAwaitPos;
@@ -1795,6 +1796,7 @@ export default class ExpressionParser extends LValParser {
     if (params) this.setArrowFunctionParameters(node, params);
     this.parseFunctionBody(node, true);
 
+    this.scope.exit();
     this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
     this.state.yieldPos = oldYieldPos;
     this.state.awaitPos = oldAwaitPos;
@@ -1890,7 +1892,6 @@ export default class ExpressionParser extends LValParser {
       node.body = this.parseBlock(true, false);
       this.state.labels = oldLabels;
     }
-    this.scope.exit();
 
     this.state.inParameters = oldInParameters;
     // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'