Bump jna-platform from 5.3.1 to 5.4.0 in /core (#1796)

Bumps [jna-platform](https://github.com/java-native-access/jna) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/java-native-access/jna/releases)
- [Changelog](https://github.com/java-native-access/jna/blob/master/CHANGES.md)
- [Commits](java-native-access/jna@5.3.1...5.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: null <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Richard North <rich.north@gmail.com>

core/build.gradle

@@ -76,7 +76,7 @@ dependencies {
         exclude(group: "log4j", module: "log4j")
     }
 
-    compile "net.java.dev.jna:jna-platform:5.3.1"
+    compile "net.java.dev.jna:jna-platform:5.4.0"
 
     shaded ('org.scala-sbt.ipcsocket:ipcsocket:1.0.0') {
         exclude(group: "net.java.dev.jna")