message: fix type errors in matrix.ts
diff: @@ -33,7 +33,7 @@ export function matrixForQuery (
  vy: $rdf.Variable,
  vvalue: $rdf.Variable,
  options: MatrixOptions,
  - whenDone: Function
  + whenDone: () => void
  ) {
  // @@ TODO Remove need to cast to any
  const matrix: any = dom.createElement('table')
  @@ -71,7 +71,7 @@ export function matrixForQuery (
  header.setAttribute('style', 'padding: 0.3em;')
  header.textContent = utils.label(y1) // first approximation
  if (y1.termType === 'NamedNode') {
  - kb.fetcher.nowOrWhenFetched(y1.uri.split('#')[0], undefined, function (
  + kb.fetcher!.nowOrWhenFetched(y1.uri.split('#')[0], undefined, function (
  ok,
  _body,
  _response
  