[PS] upgrade PS to 0.13.8

nix/easy-ps.nix

@@ -5,7 +5,7 @@ import
     pkgs.fetchFromGitHub {
       owner = "justinwoo";
       repo = "easy-purescript-nix";
-      rev = "14e7d85431e9f9838d7107d18cb79c7fa534f54e";
+      rev = "7ebddd8613cf6736dbecef9fce4c32f2a104ef82";
       sha256 = "0lmkppidmhnayv0919990ifdd61f9d23dzjzr8amz7hjgc74yxs0";
     }
   ) {

nix/generate-packages-json.nix

@@ -6,7 +6,7 @@ let
     pkgs.fetchFromGitHub {
       owner = "justinwoo";
       repo = "easy-dhall-nix";
-      rev = "288ee825c326f352a5db194a024bd3e1f2f735b2";
+      rev = "90957969850a44481c6e150350c56e8b53b29e1e";
       sha256 = "12v4ql1nm1famz8r80k1xkkdgj7285vy2vn16iili0qwvz3i98ah";
     }
   ) {

nix/pinned.nix

 import (
   builtins.fetchTarball {
-    url = "https://github.com/nixos/nixpkgs/archive/ece829033b7b8f4e81261fef5427144df4147bc4.tar.gz";
+    url = "https://github.com/NixOS/nixpkgs/archive/20.03.tar.gz";
     sha256 = "07n91k3d9i9pym8npsszha9mnvg4d1r0l0ldnhk4g8sx15vv1br5";
   }
 )

packages.dhall

 let mkPackage =
-      https://raw.githubusercontent.com/purescript/package-sets/psc-0.13.2-20190804/src/mkPackage.dhall sha256:0b197efa1d397ace6eb46b243ff2d73a3da5638d8d0ac8473e8e4a8fc528cf57
+      https://raw.githubusercontent.com/purescript/package-sets/psc-0.13.8-20200724/src/mkPackage.dhall sha256:0b197efa1d397ace6eb46b243ff2d73a3da5638d8d0ac8473e8e4a8fc528cf57
 
 let upstream =
-      https://github.com/purescript/package-sets/releases/download/psc-0.13.2-20190804/packages.dhall sha256:2230fc547841b54bca815eb0058414aa03ed7b675042f8b3dda644e1952824e5
+      https://github.com/purescript/package-sets/releases/download/psc-0.13.8-20200724/packages.dhall sha256:2230fc547841b54bca815eb0058414aa03ed7b675042f8b3dda644e1952824e5
 
 let overrides =
       { thermite =

yarn.lock

@@ -2409,7 +2409,7 @@ prop-types@15.6.2:
     loose-envify "^1.3.1"
     object-assign "^4.1.1"
 
-prop-types@^15.6.2:
+prop-types@^15.6.2, prop-types@^15.7.2:
   version "15.7.2"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.7.2.tgz#52c41e75b8c87e72b9d9360e0206b99dcbffa6c5"
   integrity sha512-8QQikdH7//R2vurIJSutZ1smHYTcLpRWEOlHnzcWHmBYrOGUysKwSsrC89BCiFj3CbrfJ/nXFdJepOVrY1GCHQ==