Zoxc is stepping back from the compiler team (#316)

Thanks for all your hard work, Zoxc! <3

Move Zoxc to alumni membership in the compiler team.

Also, adjust wg-parallel-rustc to more accurately reflect folks who've
been active recently. I'm putting down simulacrum as the lead (and
myself as the co-lead or liaison) since he was playing that
role. Regardless, we need to have a sync meeting to decide whether
this effort will continue and who will lead it up.

teams/compiler.toml

@@ -13,11 +13,11 @@ members = [
     "matthewjasper",
     "varkor",
     "wesleywiser",
-    "Zoxc",
 ]
 alumni = [
     "cramertj",
     "michaelwoerister",
+    "Zoxc",
 ]
 
 [permissions]

teams/wg-parallel-rustc.toml

@@ -3,8 +3,8 @@ subteam-of = "compiler"
 wg = true
 
 [people]
-leads = ["Zoxc", "michaelwoerister"]
-members = ["Zoxc", "michaelwoerister"]
+leads = ["Mark-Simulacrum", "nikomatsakis"]
+members = ["nikomatsakis", "Mark-Simulacrum", "alexcrichton", "cuviper", "spastorino"]
 
 [website]
 name = "Parallel rustc working group"