Update submodule to new upstream target porting branch (microsoft#702)

Author: jakebailey

.gitmodules

@@ -1,3 +1,4 @@
 [submodule "_submodules/TypeScript"]
 	path = _submodules/TypeScript
 	url = https://github.com/microsoft/TypeScript.git
+	branch = tsgo-port

_submodules/TypeScript

@@ -1,23 +1,11 @@
 --- old.ambientExportDefaultErrors.types
 +++ new.ambientExportDefaultErrors.types
-@@= skipped -31, +31 lines =@@
- >"indirect" : typeof import("indirect")
- 
+@@= skipped -33, +33 lines =@@
      export default typeof Foo.default;
-->typeof Foo.default : "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "function"
-+>typeof Foo.default : "bigint" | "boolean" | "function" | "number" | "object" | "string" | "symbol" | "undefined"
+ >typeof Foo.default : "bigint" | "boolean" | "function" | "number" | "object" | "string" | "symbol" | "undefined"
  >Foo.default : number
 ->Foo : typeof Foo
 +>Foo : typeof import("foo")
  >default : number
  }
 
-@@= skipped -12, +12 lines =@@
- >"indirect2" : typeof import("indirect2")
- 
-     export = typeof Foo2;
-->typeof Foo2 : "string" | "number" | "bigint" | "boolean" | "symbol" | "undefined" | "object" | "function"
-+>typeof Foo2 : "bigint" | "boolean" | "function" | "number" | "object" | "string" | "symbol" | "undefined"
- >Foo2 : number
- }
- 

testdata/baselines/reference/submodule/compiler/ambientExportDefaultErrors.types.diff

@@ -9,13 +9,3 @@
  >a : Fn<T>[]
  >b : Fn<T1>[]
 
-     b.concat(a);
- >b.concat(a) : Fn<T1>[]
-->b.concat : { (...items: ConcatArray<Fn<T1>>[]): Fn<T1>[]; (...items: (Fn<T1> | ConcatArray<Fn<T1>>)[]): Fn<T1>[]; }
-+>b.concat : { (...items: ConcatArray<Fn<T1>>[]): Fn<T1>[]; (...items: (ConcatArray<Fn<T1>> | Fn<T1>)[]): Fn<T1>[]; }
- >b : Fn<T1>[]
-->concat : { (...items: ConcatArray<Fn<T1>>[]): Fn<T1>[]; (...items: (Fn<T1> | ConcatArray<Fn<T1>>)[]): Fn<T1>[]; }
-+>concat : { (...items: ConcatArray<Fn<T1>>[]): Fn<T1>[]; (...items: (ConcatArray<Fn<T1>> | Fn<T1>)[]): Fn<T1>[]; }
- >a : Fn<T>[]
- }
-