feat: align TSModuleDeclaration with babel-typescript

src/convert.ts

@@ -2527,6 +2527,9 @@ export default function convert(config: ConvertConfig): ESTreeNode | null {
       }
       // apply modifiers first...
       applyModifiersToResult((node as any).modifiers);
+      if (node.flags & ts.NodeFlags.GlobalAugmentation) {
+        result.global = true;
+      }
       // ...then check for exports
       result = nodeUtils.fixExports(node, result as any, ast);
       break;

src/temp-types-based-on-js-source.ts

@@ -32,6 +32,7 @@ export interface ESTreeNode {
   decorators?: any;
   const?: boolean;
   declare?: boolean;
+  global?: boolean;
   modifiers?: any;
   body?: any;
   params?: any;

tests/fixtures/typescript/namespaces-and-modules/global-module-declaration.src.ts

@@ -0,0 +1,8 @@
+declare global {
+    declare module global {
+
+    }
+    declare namespace global {
+
+    }
+}