Use the compatible caret for all dependencies

Previously downsteam projects must use these exact versions, now they can use anything compatible with the test helpers versions.

Author: Pezmc

package.json

@@ -13,18 +13,18 @@
     "url": "https://github.com/node-red/node-red-node-test-helper.git"
   },
   "dependencies": {
-    "body-parser": "1.20.2",
-    "express": "4.18.2",
-    "read-pkg-up": "7.0.1",
-    "semver": "7.5.4",
+    "body-parser": "^1.20.2",
+    "express": "^4.18.2",
+    "read-pkg-up": "^7.0.1",
+    "semver": "^7.5.4",
     "should": "^13.2.3",
-    "should-sinon": "0.0.6",
-    "sinon": "11.1.2",
-    "stoppable": "1.1.0",
-    "supertest": "6.3.3"
+    "should-sinon": "^0.0.6",
+    "sinon": "^11.1.2",
+    "stoppable": "^1.1.0",
+    "supertest": "^6.3.3"
   },
   "devDependencies": {
-    "mocha": "9.2.2"
+    "mocha": "^9.2.2"
   },
   "contributors": [
     {