Release 6.0.0-rc.1

This change also includes some minor packaging changes in order to make Cargo happy.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rojo"
-version = "0.6.0-alpha.3"
+version = "6.0.0-rc.1"
 authors = ["Lucien Greathouse <me@lpghatguy.com>"]
 description = "Enables professional-grade development tools for Roblox developers"
 license = "MPL-2.0"
@@ -11,7 +11,6 @@ readme = "README.md"
 edition = "2018"
 
 exclude = [
-    "/plugin/**",
     "/test-projects/**",
 ]
 
@@ -58,7 +57,7 @@ name = "build"
 harness = false
 
 [dependencies]
-memofs = { version = "0.1.1", path = "memofs" }
+memofs = { version = "0.1.2", path = "memofs" }
 
 anyhow = "1.0.27"
 backtrace = "0.3"
@@ -102,6 +101,7 @@ memofs = { version = "0.1.0", path = "memofs" }
 
 anyhow = "1.0.27"
 bincode = "1.2.1"
+fs-err = "2.3.0"
 maplit = "1.0.1"
 
 [dev-dependencies]