upgrade packages for preact x

package.json

@@ -3,7 +3,7 @@
 	"version": "4.0.2",
 	"description": "A blazing fast & offline web playground",
 	"scripts": {
-		"start": "npm run -s dev && gulp start-preview-server",
+		"start": "npm run -s dev",
 		"build": "preact build --template src/index.html --no-prerender --service-worker false",
 		"serve": "preact build && preact serve",
 		"dev": "preact watch --template src/index.html --no-prerender",
@@ -33,6 +33,7 @@
 		]
 	},
 	"devDependencies": {
+		"@11ty/eleventy": "^0.7.1",
 		"@lingui/cli": "^2.7.0",
 		"@lingui/macro": "^2.7.0",
 		"babel-core": "^6.26.3",
@@ -53,14 +54,13 @@
 		"if-env": "^1.0.0",
 		"jest": "^21.2.1",
 		"lint-staged": "^7.2.0",
+		"markdown-it": "^8.4.2",
+		"markdown-it-anchor": "^5.0.2",
 		"merge-stream": "^1.0.1",
-		"preact-cli": "^2.1.0",
+		"preact-cli": "^3.0.0-rc.3",
 		"preact-render-spy": "^1.2.1",
 		"run-sequence": "^2.2.1",
-		"sw-precache": "^5.2.0",
-		"@11ty/eleventy": "^0.7.1",
-		"markdown-it": "^8.4.2",
-		"markdown-it-anchor": "^5.0.2"
+		"sw-precache": "^5.2.0"
 	},
 	"dependencies": {
 		"@emmetio/codemirror-plugin": "^0.5.4",
@@ -72,8 +72,7 @@
 		"firebase": "^5.5.8",
 		"gulp-connect": "^5.7.0",
 		"jszip": "^3.1.5",
-		"preact": "^8.2.6",
-		"preact-compat": "^3.17.0",
+		"preact": "^10.0.0-rc.0",
 		"preact-portal": "^1.1.3",
 		"preact-router": "^2.5.7",
 		"prettier": "^1.16.4",
@@ -103,9 +102,8 @@
 			"\\.(css|less|scss)$": "identity-obj-proxy",
 			"^./style$": "identity-obj-proxy",
 			"^preact$": "<rootDir>/node_modules/preact/dist/preact.min.js",
-			"^react$": "preact-compat",
-			"^react-dom$": "preact-compat",
-			"^create-react-class$": "preact-compat/lib/create-react-class",
+			"^react$": "preact/compat",
+			"^react-dom$": "preact/compat",
 			"^react-addons-css-transition-group$": "preact-css-transition-group"
 		}
 	},