message: feat: coerce some strings and numbers into boolean
diff: @@ -280,19 +280,20 @@ export class ConfigReader implements Config {
  /** {@inheritdoc Config.getOptionalBoolean} */
  getOptionalBoolean(key: string): boolean | undefined {
  - const value = this.readConfigValue<string | boolean>(
  + const value = this.readConfigValue<string | number | boolean>(
  key,
  val =>
  typeof val === 'boolean' ||
  + typeof val === 'number' ||
  typeof val === 'string' || { expected: 'boolean' },
  );
  if (typeof value === 'boolean' || value === undefined) {
  return value;
  }
  let boolean;
  - if (value === 'true') {
  + if (/^(?:y|yes|true|1|on)$/i.test(value as string) || value === 1) {
  boolean = true;
  - } else if (value === 'false') {
  + } else if (/^(?:n|no|false|0|off)$/i.test(value as string) || value === 0) {
  boolean = false;
  } else {
  throw new Error(
  