PostCSS 8, bump deps

Author: RobbieTheWagner

package.json

@@ -36,9 +36,9 @@
   },
   "devDependencies": {
     "@babel/core": "^7.13.10",
-    "@babel/preset-env": "^7.13.10",
-    "@testing-library/jest-dom": "^5.11.9",
-    "autoprefixer": "^9.8.6",
+    "@babel/preset-env": "^7.13.12",
+    "@testing-library/jest-dom": "^5.11.10",
+    "autoprefixer": "^10.2.5",
     "babel-jest": "^26.6.3",
     "babel-plugin-rewire": "^1.2.0",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.26.2",
@@ -53,11 +53,11 @@
     "jest-expect-message": "^1.0.2",
     "jest-transform-css": "^2.1.0",
     "mutationobserver-shim": "^0.3.7",
-    "postcss": "^7.0.35",
+    "postcss": "^8.2.8",
     "release-it": "^14.2.1",
     "release-it-lerna-changelog": "^3.1.0",
     "rimraf": "^3.0.2",
-    "rollup": "^2.42.2",
+    "rollup": "^2.42.4",
     "rollup-plugin-babel": "^4.4.0",
     "rollup-plugin-browsersync": "^1.3.1",
     "rollup-plugin-eslint": "^7.0.0",
@@ -66,7 +66,7 @@
     "rollup-plugin-sass": "^1.2.2",
     "rollup-plugin-terser": "^7.0.2",
     "rollup-plugin-visualizer": "^4.2.2",
-    "sinon": "^9.2.4",
+    "sinon": "^10.0.0",
     "start-server-and-test": "^1.12.1"
   },
   "publishConfig": {