Bump express from 4.17.1 to 4.18.2

Bumps [express](https://github.com/expressjs/express) from 4.17.1 to 4.18.2.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](https://github.com/expressjs/express/compare/4.17.1...4.18.2)

---
updated-dependencies:
- dependency-name: express
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "safesupport-chatbox",
-  "version": "1.1.4",
+  "version": "1.1.5",
   "description": "A secure and private embeddable chatbox that connects to Riot",
   "main": "dist/chatbox.js",
   "scripts": {

src/components/_dark_mode.scss

@@ -68,7 +68,6 @@
     .message {
       &.from-bot {
         color: transparentize($light-text-color, 0.3);
-        font-size: 0.9rem;
       }
 
       &.from-me {