Increase version to v1.10.4

## Changes
- Use blue icons as favicons for better contrast (#235)
- Fix pairdrop-cli exit on error
- Enhancement: On release: Prevent nesting of pairdrop-cli folder inside pairdrop-cli.zip
- Enhance documentation for pairdrop-cli and sending from context menu (#236)
- Translations update from Hosted Weblate

public/index.html

@@ -582,7 +582,7 @@
             </svg>
             <div class="title-wrapper" dir="ltr">
                 <h1>PairDrop</h1>
-                <div class="font-subheading">v1.10.3</div>
+                <div class="font-subheading">v1.10.4</div>
             </div>
             <div class="font-subheading" data-i18n-key="about.claim" data-i18n-attrs="text"></div>
             <div class="row">

public/service-worker.js

@@ -1,4 +1,4 @@
-const cacheVersion = 'v1.10.3';
+const cacheVersion = 'v1.10.4';
 const cacheTitle = `pairdrop-cache-${cacheVersion}`;
 const forceFetch = false; // FOR DEVELOPMENT: Set to true to always update assets instead of using cached versions
 const relativePathsToCache = [