Sync to upstream Jecs 0.5.5 (#9)

Reviewed-on: #9

pesde.toml

@@ -1,7 +1,7 @@
 authors = ["jecs authors"]
 description = "A minimal copy of jecs published on the official pesde registry"
 includes = [
-    "init.luau",
+    "jecs.luau",
     "pesde.toml",
     "README.md",
     "CHANGELOG.md",
@@ -18,4 +18,4 @@ default = "https://github.com/pesde-pkg/index"
 
 [target]
 environment = "luau"
-lib = "init.luau"
+lib = "jecs.luau"