[Bugfix] Reset Image state when src is updated

[davidvedvick]

Types of Changes

Prerequisites

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• I have read the CONTRIBUTING document
• My code follows the code style of this project

Contribution Type

What types of changes does your code introduce? Put an x in all the boxes that apply:

• Bug fix (non-breaking change which fixes an issue, please reference the issue id): Image does not refresh if preload is true #394
• New feature (non-breaking change which adds functionality, make sure to open an associated issue first)
• Breaking change (fix or feature that would cause existing functionality to change)
• My change requires a change to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Description

The <Image /> tag will not update if preload is set to true. This change resets the <Image /> state when the src changes and preload is true. This change will also properly clean-up the hidden image tag when the component unmounts.

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