Merge remote-tracking branch 'misskey-original/develop' into develop

# Conflicts:
#	package.json
#	packages/frontend/src/components/MkEmojiEditDialog.vue
#	packages/frontend/src/components/MkMenu.vue
#	packages/frontend/src/components/MkNote.vue
#	packages/frontend/src/pages/timeline.vue

packages/backend/src/postgres.ts

@@ -215,22 +215,24 @@ export function createPostgresDataSource(config: Config) {
 			statement_timeout: 1000 * 10,
 			...config.db.extra,
 		},
-		replication: config.dbReplications ? {
-			master: {
-				host: config.db.host,
-				port: config.db.port,
-				username: config.db.user,
-				password: config.db.pass,
-				database: config.db.db,
+		...(config.dbReplications ? {
+			replication: {
+				master: {
+					host: config.db.host,
+					port: config.db.port,
+					username: config.db.user,
+					password: config.db.pass,
+					database: config.db.db,
+				},
+				slaves: config.dbSlaves!.map(rep => ({
+					host: rep.host,
+					port: rep.port,
+					username: rep.user,
+					password: rep.pass,
+					database: rep.db,
+				})),
 			},
-			slaves: config.dbSlaves!.map(rep => ({
-				host: rep.host,
-				port: rep.port,
-				username: rep.user,
-				password: rep.pass,
-				database: rep.db,
-			})),
-		} : undefined,
+		} : {}),
 		synchronize: process.env.NODE_ENV === 'test',
 		dropSchema: process.env.NODE_ENV === 'test',
 		cache: !config.db.disableCache && process.env.NODE_ENV !== 'test' ? { // dbをcloseしても何故かredisのコネクションが内部的に残り続けるようで、テストの際に支障が出るため無効にする(キャッシュも含めてテストしたいため本当は有効にしたいが...)