fix(VFileInput): bug in Safari where file is not added

[nekosaur]

Description

Safari does not seem to emit an input event when selecting a file, even though
from what I can see the HTML spec says both an input and change event should
be emitted.

Motivation and Context

closes #7941

How Has This Been Tested?

playground

Markup:

<template>
  <v-container class="pa-0">
    <v-file-input label="File input" v-model="asd"></v-file-input>
    {{ asd }}
  </v-container>
</template>

<script>
export default {
  data: () => ({
    asd: null,
    mode: 'hex',
    color: '#ff00ff'
  }),
  watch: {
    asd (v) {
      console.log(v)
    }
  }
}
</script>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and breaking changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)
• I've added new examples to the kitchen (applies to new features and breaking changes in core library)