Fix deprecation warning in number entity

[vlebourl]

Resolves #39

[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 2.37%.

Quality metrics	Before	After	Change
Complexity	1.33 ⭐	1.40 ⭐	0.07 👎
Method Length	21.92 ⭐	27.46 ⭐	5.54 👎
Working memory	3.47 ⭐	3.93 ⭐	0.46 👎
Quality	93.43% ⭐	91.06% ⭐	-2.37% 👎

Other metrics	Before	After	Change
Lines	182	158	-24

Changed files	Quality Before	Quality After	Quality Change
custom_components/vesync/number.py	93.43% ⭐	91.06% ⭐	-2.37% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication