Extract database types into own file to fix tests.

server/types/database.ts

@@ -0,0 +1,51 @@
+import {ISqlite, Statement} from "sqlite";
+
+export type RunResult = ISqlite.RunResult;
+export type SqlType = ISqlite.SqlType;
+
+export {Statement};
+
+export interface TypedDatabase {
+    /**
+     * @see Database.on
+     */
+    on(event: string, listener: any): Promise<void>;
+
+    /**
+     * @see Database.run
+     */
+    run(sql: SqlType, ...params: any[]): Promise<RunResult>;
+
+    /**
+     * @see Database.get
+     */
+    get<T>(sql: SqlType, ...params: any[]): Promise<T | undefined>;
+
+    /**
+     * @see Database.each
+     */
+    each<T>(sql: SqlType, callback: (err: any, row: T) => void): Promise<number>;
+
+    each<T>(sql: SqlType, param1: any, callback: (err: any, row: T) => void): Promise<number>;
+
+    each<T>(sql: SqlType, param1: any, param2: any, callback: (err: any, row: T) => void): Promise<number>;
+
+    each<T>(sql: SqlType, param1: any, param2: any, param3: any, callback: (err: any, row: T) => void): Promise<number>;
+
+    each<T>(sql: SqlType, ...params: any[]): Promise<number>;
+
+    /**
+     * @see Database.all
+     */
+    all<T = never>(sql: SqlType, ...params: any[]): Promise<T[]>;
+
+    /**
+     * @see Database.exec
+     */
+    exec(sql: SqlType, ...params: any[]): Promise<void>;
+
+    /**
+     * @see Database.prepare
+     */
+    prepare(sql: SqlType, ...params: any[]): Promise<Statement>;
+}