wrap numeric key names in quotes

Author: zeke

lib/module-declaration.js

@@ -204,7 +204,13 @@ const generateModuleDeclaration = (module, index, API) => {
 
         utils.extendArray(moduleAPI, utils.wrapComment(p.description))
         if (module.name === 'process' && p.name === 'versions') return
-        moduleAPI.push(`${isStatic}${p.name}${isOptional}: ${type};`)
+
+        if (p.name.match(/^\d/)) {
+          // Wrap key in quotes if it starts with a number, e.g. `2d_canvas`
+          moduleAPI.push(`'${isStatic}${p.name}${isOptional}': ${type};`)
+        } else {
+          moduleAPI.push(`${isStatic}${p.name}${isOptional}: ${type};`)
+        }
       })
   }