Switch to npm, upgrade Lerna, upgrade react-scripts

lerna.json

@@ -3,6 +3,5 @@
     "packages/*"
   ],
   "version": "independent",
-  "npmClient": "yarn",
   "useWorkspaces": true
 }

package.json

@@ -7,7 +7,7 @@
   ],
   "scripts": {},
   "devDependencies": {
-    "lerna": "^4.0.0"
+    "lerna": "^6.6.1"
   },
   "resolutions": {
     "acorn": "^8.5.0"

packages/example-client/package.json

@@ -15,7 +15,7 @@
     "ketchup-react": "^0.1.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
-    "react-scripts": "^4.0.3",
+    "react-scripts": "^5.0.1",
     "typescript": "^4.1.2",
     "web-vitals": "^2.1.2"
   },

packages/wonders-client/package.json

@@ -17,7 +17,7 @@
     "ketchup-react": "^0.1.1",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
-    "react-scripts": "^4.0.3",
+    "react-scripts": "^5.0.1",
     "roman-numerals": "^0.3.2",
     "typescript": "^4.1.2",
     "web-vitals": "^2.1.2",