fix(vue3): inject value showing default over falsy value

[psevertson]

Description

The Injects values are incorrectly coalescing falsy values to their default values when the component is written in Options mode.

Additional context

If a parent component provides a falsy value (false, null, 0, "", etc.), then a child component written in Options mode will incorrectly coalese that and show the default value given for the inject.

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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