chore!: move away from ESM

It turns out that Jest's ESM support still relies on experimental node
modules (as of node 18). Switch back to commonjs instead.

package.json

@@ -14,7 +14,8 @@
     "post-upgrade": "npx projen post-upgrade",
     "pre-compile": "npx projen pre-compile",
     "release": "npx projen release",
-    "test": "node --no-warnings --experimental-vm-modules node_modules/.bin/jest.js",
+    "test": "npx projen test",
+    "test:watch": "npx projen test:watch",
     "unbump": "npx projen unbump",
     "upgrade": "npx projen upgrade",
     "watch": "npx projen watch",
@@ -105,13 +106,7 @@
         }
       ]
     ],
-    "preset": "ts-jest/presets/default-esm-legacy",
-    "extensionsToTreatAsEsm": [
-      ".ts"
-    ],
-    "moduleNameMapper": {
-      "^(\\.{1,2}/.*)\\.js$": "$1"
-    },
+    "preset": "ts-jest",
     "transform": {
       "^.+\\.[tj]sx?$": [
         "ts-jest",
@@ -127,6 +122,5 @@
     "@types/responselike": "1.0.0",
     "got": "12.3.1"
   },
-  "type": "module",
   "//": "~~ Generated by projen. To modify, edit .projenrc.js and run \"npx projen\"."
 }