Upgrade spring-boot-environment cloud dependencies
<guava.version>18.0</guava.version>
<subethasmtp.version>3.1.7</subethasmtp.version>
<httpclient.version>4.5.8</httpclient.version>
- <spring.cloud-version>2020.0.0</spring.cloud-version>
+ <spring.cloud-version>2021.0.0</spring.cloud-version>
</properties>
</project>
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