Update dependency @fullhuman/postcss-purgecss to v4

package.json

@@ -21,7 +21,7 @@
     "release": "auto shipit"
   },
   "dependencies": {
-    "@fullhuman/postcss-purgecss": "2.3.0",
+    "@fullhuman/postcss-purgecss": "4.0.2",
     "compression": "1.7.4",
     "congress-legislators": "https://github.com/unitedstates/congress-legislators.git",
     "polka": "next",

yarn.lock

@@ -1460,13 +1460,12 @@
     minimatch "^3.0.4"
     strip-json-comments "^3.1.1"
 
-"@fullhuman/postcss-purgecss@2.3.0":
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-2.3.0.tgz#50a954757ec78696615d3e118e3fee2d9291882e"
-  integrity sha512-qnKm5dIOyPGJ70kPZ5jiz0I9foVOic0j+cOzNDoo8KoCf6HjicIZ99UfO2OmE7vCYSKAAepEwJtNzpiiZAh9xw==
+"@fullhuman/postcss-purgecss@4.0.2":
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/@fullhuman/postcss-purgecss/-/postcss-purgecss-4.0.2.tgz#6e4809293f006957dfa2d6b4fc9c77d26091177e"
+  integrity sha512-Qm8M89v4HVUTBQwuWREtzQojSqAbdp98kALMEw2NTrtrgHVqbLQrdiTBr0DAiNmG3hcqXSEexF/78uNUthMM9w==
   dependencies:
-    postcss "7.0.32"
-    purgecss "^2.3.0"
+    purgecss "^4.0.2"
 
 "@fullhuman/postcss-purgecss@^2.1.2":
   version "2.2.0"
@@ -3214,6 +3213,11 @@ commander@^5.0.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-5.1.0.tgz#46abbd1652f8e059bddaef99bbdcb2ad9cf179ae"
   integrity sha512-P0CysNDQ7rtVw4QIQtm+MRxV66vKFSvlsQvGYXZWR3qFU0jlMKHZZZgw8e+8DSah4UDKMqnknRDQz+xuQXQ/Zg==
 
+commander@^6.0.0:
+  version "6.2.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-6.2.1.tgz#0792eb682dfbc325999bb2b84fddddba110ac73c"
+  integrity sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==
+
 commander@^6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-6.2.0.tgz#b990bfb8ac030aedc6d11bc04d1488ffef56db75"
@@ -6582,6 +6586,11 @@ ms@2.1.2, ms@^2.1.1:
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
   integrity sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==
 
+nanoid@^3.1.20:
+  version "3.1.20"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.20.tgz#badc263c6b1dcf14b71efaa85f6ab4c1d6cfc788"
+  integrity sha512-a1cQNyczgKbLX9jwbS/+d7W8fX/RfgYR7lVWwWOGIPNgK2m0MWvrGF6/m4kk6U3QcFMnZf3RIhL0v2Jgh/0Uxw==
+
 nanomatch@^1.2.9:
   version "1.2.13"
   resolved "https://registry.yarnpkg.com/nanomatch/-/nanomatch-1.2.13.tgz#b87a8aa4fc0de8fe6be88895b38983ff265bd119"
@@ -7316,7 +7325,16 @@ postcss@7.0.28:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@7.0.32, postcss@^7.0.0, postcss@^7.0.11, postcss@^7.0.18, postcss@^7.0.21, postcss@^7.0.30, postcss@^7.0.7:
+postcss@^6.0.9:
+  version "6.0.23"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
+  integrity sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==
+  dependencies:
+    chalk "^2.4.1"
+    source-map "^0.6.1"
+    supports-color "^5.4.0"
+
+postcss@^7.0.0, postcss@^7.0.11, postcss@^7.0.18, postcss@^7.0.21, postcss@^7.0.30, postcss@^7.0.7:
   version "7.0.32"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.32.tgz#4310d6ee347053da3433db2be492883d62cec59d"
   integrity sha512-03eXong5NLnNCD05xscnGKGDZ98CyzoqPSMjOe6SuoQY7Z2hIj0Ld1g/O/UQRuOle2aRtiIRDg9tDcTGAkLfKw==
@@ -7325,14 +7343,14 @@ postcss@7.0.32, postcss@^7.0.0, postcss@^7.0.11, postcss@^7.0.18, postcss@^7.0.2
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-postcss@^6.0.9:
-  version "6.0.23"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-6.0.23.tgz#61c82cc328ac60e677645f979054eb98bc0e3324"
-  integrity sha512-soOk1h6J3VMTZtVeVpv15/Hpdl2cBLX3CAw4TAbkpTJiNPk9YP/zWcD1ND+xEtvyuuvKzbxliTOIyvkSeSJ6ag==
+postcss@^8.2.1:
+  version "8.2.6"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.6.tgz#5d69a974543b45f87e464bc4c3e392a97d6be9fe"
+  integrity sha512-xpB8qYxgPuly166AGlpRjUdEYtmOWx2iCwGmrv4vqZL9YPVviDVPZPRXxnXr6xPZOdxQ9lp3ZBFCRgWJ7LE3Sg==
   dependencies:
-    chalk "^2.4.1"
+    colorette "^1.2.1"
+    nanoid "^3.1.20"
     source-map "^0.6.1"
-    supports-color "^5.4.0"
 
 prelude-ls@^1.2.1:
   version "1.2.1"
@@ -7437,14 +7455,14 @@ purgecss@^2.2.0:
     postcss "7.0.28"
     postcss-selector-parser "^6.0.2"
 
-purgecss@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-2.3.0.tgz#5327587abf5795e6541517af8b190a6fb5488bb3"
-  integrity sha512-BE5CROfVGsx2XIhxGuZAT7rTH9lLeQx/6M0P7DTXQH4IUc3BBzs9JUzt4yzGf3JrH9enkeq6YJBe9CTtkm1WmQ==
+purgecss@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/purgecss/-/purgecss-4.0.2.tgz#7281f233c08b4f41e1c5d85c66a2d064e6d7e1b3"
+  integrity sha512-6J1zOEAZJX6VbfcaJHgdQf4uPhxVXvHz7dGgWYXLOI9q7QFZ5feh8NZ2+G3ysii/Sr8OyUe5yhQ5Z/xZ5gIRnQ==
   dependencies:
-    commander "^5.0.0"
+    commander "^6.0.0"
     glob "^7.0.0"
-    postcss "7.0.32"
+    postcss "^8.2.1"
     postcss-selector-parser "^6.0.2"
 
 q@^1.5.1: