build: update package-set

packages.dhall

@@ -117,7 +117,7 @@ let additions =
 -------------------------------
 -}
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20210118/packages.dhall sha256:a59c5c93a68d5d066f3815a89f398bcf00e130a51cb185b2da29b20e2d8ae115
+      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20210226/packages.dhall sha256:7e973070e323137f27e12af93bc2c2f600d53ce4ae73bb51f34eb7d7ce0a43ea
 
 let overrides = {=}