Update plugin manifest for v0.3 pre-release.
Update plugin manifest for v0.3 pre-release.

ArCorvus/ue4-hg-plugin,enlight/ue4-hg-plugin,enlight/ue4-hg-plugin,ArCorvus/ue4-hg-plugin,ArCorvus/ue4-hg-plugin,enlight/ue4-hg-plugin