Add types declaration file (resolve #46)

index.d.ts

@@ -0,0 +1,36 @@
+import { Model, ModelClass, Page } from 'objection';
+import { QueryBuilder } from 'knex';
+
+declare module 'objection-hashid' {
+  class AuthQueryBuilder<M extends Model, R = M[]> extends Model.QueryBuilder<M, R> {
+    ArrayQueryBuilderType: AuthQueryBuilder<M, M[]>;
+    SingleQueryBuilderType: AuthQueryBuilder<M, M>;
+    NumberQueryBuilderType: AuthQueryBuilder<M, number>;
+    PageQueryBuilderType: AuthQueryBuilder<M, Page<M>>;
+  }
+
+  class HashIdModelClass extends Model {
+    QueryBuilderType: AuthQueryBuilder<this>;
+    QueryBuilder: AuthQueryBuilder<this>;
+
+    static get hashIdSalt(): string;
+
+    static get hashIdMinLength(): number | void;
+
+    static get hashIdAlphabet(): string | void;
+
+    static get hashIdSeps(): string | void;
+
+    static get _hashIdInstance(): string;
+
+    get hashId(): string;
+
+    get hashid(): string;
+
+    static get hashIdField(): string;
+
+    static get hashedFields(): Array<any>;
+  }
+
+  export default function hashid(model: new () => Model): ModelClass<HashIdModelClass>;
+}