Bump Amazon.Lambda.Core and Amazon.Lambda.RuntimeSupport (#2183)

Bumps Amazon.Lambda.Core from 2.7.1 to 2.8.0
Bumps Amazon.Lambda.RuntimeSupport from 1.13.4 to 1.14.0

---
updated-dependencies:
- dependency-name: Amazon.Lambda.Core
  dependency-version: 2.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Amazon.Lambda.RuntimeSupport
  dependency-version: 1.14.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Directory.Packages.props

@@ -14,8 +14,8 @@
   <ItemGroup>
     <PackageVersion Include="Amazon.Lambda.APIGatewayEvents" Version="2.7.1" />
     <PackageVersion Include="Amazon.Lambda.AspNetCoreServer.Hosting" Version="1.9.0" />
-    <PackageVersion Include="Amazon.Lambda.RuntimeSupport" Version="1.13.4" />
-    <PackageVersion Include="Amazon.Lambda.Core" Version="2.7.1" />
+    <PackageVersion Include="Amazon.Lambda.RuntimeSupport" Version="1.14.0" />
+    <PackageVersion Include="Amazon.Lambda.Core" Version="2.8.0" />
     <PackageVersion Include="Amazon.Lambda.S3Events" Version="3.1.0" />
     <PackageVersion Include="Amazon.Lambda.Serialization.SystemTextJson" Version="2.4.4" />
     <PackageVersion Include="Amazon.Lambda.SQSEvents" Version="2.2.0" />