Bump elliptic from 6.5.3 to 6.5.4

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.3 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.3...v6.5.4)

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

src/index.js

@@ -67,11 +67,8 @@ export default {
       this.body = ''
     },
     onKeyUp (e) {
-      const keysToIgnore = ['Shift', 'Meta', 'Control', 'Alt', 'ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight']
-      if (keysToIgnore.includes(e.key)) return
-
       let caretPosition = this.getCaretPos()
-      if (e.key === 'Enter') {
+      if (e.keyCode === 13) { // Enter key
         caretPosition++
       }
       this.body = e.target.innerText