'items' does not update when clicking any of the tabs

Repo.svelte

<script>
  import { fade } from 'svelte/transition';
  import Github from './Github.svelte';
  import GlowBox from '../GlowBox.svelte';
  import Indicator, {Recency} from './Indicator.svelte';
  import Settings from '../settings/Settings.svelte';
  import Content from './Content.svelte';
  export let repo
  let showSettings = false;
  let items = filterItems(repo, 'all');
  let currentTab = 'all';

  function filterItems(theRepo, tab) {
    if (tab === 'all') {
      return [...theRepo.activity.prs, ...theRepo.activity.issues]
    }

    if (tab === 'prs') {
      return[...theRepo.activity.prs]
    }

    if (tab === 'issues') {
      return [...theRepo.activity.issues]
    }
  };

  $: items = filterItems(repo, currentTab); items = items;

  const tabs = [
    {value: 'all', text: 'All', icon: false },
    {value: 'prs', text: 'PRs', icon: 'git-pull-request' },
    {value: 'issues', text: 'Issues', icon: 'issue-opened' },
  ]
</script>

<article transition:fade="{{duration: 500}}" class="card vertical-flex">
  <header class="card-header">
    <div class="card-header-title">
      <p class="grow">{repo.title}</p>
      <a href="#" on:click|preventDefault={() => showSettings = !showSettings}>
        <i class="icon ion-md-settings" data-testid="settings" />
      </a>
    </div>
  </header>

  <div class="card-content grow">
    {#if showSettings }
      <Settings repoId={repo.id} on:repo-deleted/>
    {:else}
      <div class="content stack">
        <div class="tabs is-boxed">
          <ul>
            {#each tabs as tab}
              <li class:is-active={currentTab === tab.value}>
                <a on:click|preventDefault={() => currentTab = tab.value}>
                  <Github icon={tab.icon} />
                  <span>{tab.text}</span>
                </a>
              </li>
            {/each}
          </ul>
        </div>
        <Content items={items} />
      </div>
    {/if}
  </div>
  <footer class="card-footer">
    <p class="is-size-7 card-footer-item">Last update 2min ago</p>
  </footer>
</article>

<style>
  ul {
    margin-left: 0;
  }
<style>