refactor(clerk-auth): enable isolated declarations (#1194)

.changeset/large-areas-take.md

@@ -0,0 +1,5 @@
+---
+'@hono/clerk-auth': patch
+---
+
+Add explicit `MiddlewareHandler` return type

packages/clerk-auth/src/index.ts

@@ -12,7 +12,7 @@ declare module 'hono' {
   }
 }
 
-export const getAuth = (c: Context) => {
+export const getAuth = (c: Context): ClerkAuth => {
   return c.get('clerkAuth')
 }
 

packages/clerk-auth/tsconfig.build.json

@@ -4,7 +4,8 @@
     "rootDir": "src",
     "outDir": "dist",
     "tsBuildInfoFile": "dist/tsconfig.build.tsbuildinfo",
-    "emitDeclarationOnly": false
+    "emitDeclarationOnly": false,
+    "isolatedDeclarations": true
   },
   "include": ["src/**/*.ts"],
   "exclude": ["**/*.test.ts"],