Fix license

Author: m-bock

spago.yaml

@@ -1,16 +1,17 @@
 package:
   dependencies:
-    [ "aff"
-    , "aff-promise"
-    , "effect"
-    , "foldable-traversable"
-    , "prelude"
-    , "spec"
+    [
+      { aff: ">=7.1.0 <8.0.0" },
+      { aff-promise: ">=4.0.0 <5.0.0" },
+      { effect: ">=4.0.0 <5.0.0" },
+      { foldable-traversable: ">=6.0.0 <7.0.0" },
+      { prelude: ">=6.0.1 <7.0.0" },
+      { spec: ">=7.5.5 <8.0.0" }
     ]
   name: spec-discovery
   publish:
     version: 8.2.1
-    license: "Mozilla Public License Version 2.0"
+    license: MPL-2.0
     location:
       githubOwner: "f-o-a-m"
       githubRepo: purescript-optparse