Fix generated types in index.d.ts

Previously namespace types were declared generated using the legacy `module` keyword from ten years ago. Now we emit the modern TS `namespace` keyword.

The outer Ambient Module Declaration intentionally remains untouched because it is not a namespace.

Author: robpalme

utils/bundle-dts.js

@@ -18,7 +18,7 @@ if (typingsLength == typings.length)
 // Rename common module to glMatrix
 typings = typings.replace(
   'declare module "common" {',
-  "export module glMatrix {"
+  "export namespace glMatrix {"
 );
 
 // Replace imports from other modules with direct references
@@ -28,7 +28,7 @@ typings = typings.replace(/import\("([^"]+?)(\.js)?"\)/g, "$1");
 typings = typings.replace(/ *import.+from.*;/g, "");
 
 // Replace declare module with exports
-typings = typings.replace(/declare module "([^"]+?)" {/g, "export module $1 {");
+typings = typings.replace(/declare module "([^"]+?)" {/g, "export namespace $1 {");
 
 // Add types
 typings = "\n" + sourceTypings.replace(/declare/g, "export") + "\n" + typings;