Feature bookstore update (#253)

* update bookstore

* update bookstore

example/bookstore/api/bookstore.api

@@ -1,33 +1,29 @@
 type (
-    addReq struct {
-        book string `form:"book"`
-        price int64 `form:"price"`
-    }
-
-    addResp struct {
-        ok bool `json:"ok"`
-    }
+	addReq {
+		book string `form:"book"`
+		price int64 `form:"price"`
+	}
+	
+	addResp {
+		ok bool `json:"ok"`
+	}
 )
 
 type (
-    checkReq struct {
-        book string `form:"book"`
-    }
-
-    checkResp struct {
-        found bool `json:"found"`
-        price int64 `json:"price"`
-    }
+	checkReq {
+		book string `form:"book"`
+	}
+	
+	checkResp {
+		found bool `json:"found"`
+		price int64 `json:"price"`
+	}
 )
 
 service bookstore-api {
-    @server(
-        handler: AddHandler
-    )
-    get /add (addReq) returns (addResp)
-
-    @server(
-        handler: CheckHandler
-    )
-    get /check (checkReq) returns (checkResp)
+	@handler AddHandler
+	get /add (addReq) returns (addResp)
+	
+	@handler CheckHandler
+	get /check (checkReq) returns (checkResp)
 }