Micronaut Servlet 2.0.0

Updates to Micronaut 2.0 as minimum

Updated dependencies

• tomcat-embed-core from 9.0.37 to 9.0.38
• jetty-servlet from 9.4.30.v20200611 to 9.4.31.v20200723
• undertow-servlet from 2.1.3.Final to 2.2.0.Final

Issues

• Fix Tomcat support for GraalVM 20.2. Fixes #40 (#41)

v2.0.0

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