message: Add change count to buildPassed messages if changes exist.
diff: import chalk from 'chalk';
  import { dedent } from 'ts-dedent';
  +import pluralize from 'pluralize';
  import { Context } from '../../../types';
  import { info, success } from '../../components/icons';
  @@ -8,6 +9,7 @@ import { stats } from '../../tasks/snapshot';
  export default ({ build, isOnboarding }: Context) => {
  const { changes, snapshots, components, stories } = stats({ build });
  + const visualChanges = pluralize('visual changes', build.changeCount, true);
  if (isOnboarding) {
  return dedent(chalk`
  ${success} {bold Build passed. Welcome to Chromatic!}
  @@ -23,7 +25,7 @@ export default ({ build, isOnboarding }: Context) => {
  `)
  : dedent(chalk`
  ${success} {bold Build ${build.number} passed!}
  - No visual changes were found in this build.
  + ${build.changeCount === 0 ? 'No visual changes' : visualChanges} were found in this build.
  ${info} View build details at ${link(build.webUrl)}
  `);
  };
  