add types for errors

src/errors/APIError.ts

@@ -5,6 +5,14 @@ import httpStatus from 'http-status';
  * @extends Error
  */
 class ExtendableError extends Error {
+  status: number;
+
+  data: any;
+
+  isPublic: boolean;
+
+  isOperational: boolean;
+
   constructor(message: string, status: number, data: any, isPublic: boolean) {
     super(message);
     this.name = this.constructor.name;
@@ -13,6 +21,8 @@ class ExtendableError extends Error {
     this.data = data;
     this.isPublic = isPublic;
     this.isOperational = true; // This is required since bluebird 4 doesn't append it anymore.
+    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+    // @ts-ignore Couldn't get the compiler to love me
     Error.captureStackTrace(this, this.constructor.name);
   }
 }