Readd mistakenly remove file.

Signed-off-by: crynobone <crynobone@gmail.com>
Utilize Illuminate\Support\Arr

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Remove invalid usage.

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Improve readme.

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Merge branch '2.1' into 2.2

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Conflicts:
	src/Memory/EloquentMemoryHandler.php
Update description.

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Add table of content.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2

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Conflicts:
	README.md
Merge branch '2.2'

Signed-off-by: crynobone <crynobone@gmail.com>

Conflicts:
	README.md