Project-specific SBT JVM options

This is a recognized limitation with the current version of SBT (v1.0.3, at the time of writing) on Windows (it doesn't recognize .sbtopts in the project's root directory). All versions now support the .jvmopts file.

You can track the status of this issue on sbt-launcher-package's _GitHub issue tracker.

UPDATE: This issue was fixed in Oct. 2019. Thanks to @conny for pointing that out.