feat(typegen): Export type, not interface (#689)

* change(typegen: TS): Export type, not interface

* change(typegen: TS): update tests

Author: isaacharrisholt

src/server/templates/typescript.ts

@@ -44,7 +44,7 @@ export const apply = ({
   let output = `
 export type Json = string | number | boolean | null | { [key: string]: Json | undefined } | Json[]
 
-export interface Database {
+export type Database = {
   ${schemas
     .sort(({ name: a }, { name: b }) => a.localeCompare(b))
     .map((schema) => {

test/server/typegen.ts

@@ -11,7 +11,7 @@ test('typegen', async () => {
       | { [key: string]: Json | undefined }
       | Json[]
 
-    export interface Database {
+    export type Database = {
       public: {
         Tables: {
           category: {
@@ -462,7 +462,7 @@ test('typegen w/ one-to-one relationships', async () => {
       | { [key: string]: Json | undefined }
       | Json[]
 
-    export interface Database {
+    export type Database = {
       public: {
         Tables: {
           category: {