chore: tweak ts config

Author: kazupon

tsconfig.json

@@ -57,9 +57,9 @@
     // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */
 
     /* Emit */
-    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
     // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
-    // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
+    "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */
     // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
     // "inlineSourceMap": true,                          /* Include sourcemap files inside the emitted JavaScript. */
     // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */