fix!: update istanbul-lib-instrument to v6 (#292)

BREAKING-CHANGE: Drop support for Node versions 8 and 10

package.json

@@ -11,8 +11,8 @@
   "dependencies": {
     "@babel/helper-plugin-utils": "^7.0.0",
     "@istanbuljs/load-nyc-config": "^1.0.0",
-    "@istanbuljs/schema": "^0.1.2",
-    "istanbul-lib-instrument": "^5.0.4",
+    "@istanbuljs/schema": "^0.1.3",
+    "istanbul-lib-instrument": "^6.0.2",
     "test-exclude": "^6.0.0"
   },
   "devDependencies": {
@@ -22,8 +22,8 @@
     "@babel/plugin-transform-modules-commonjs": "^7.24.1",
     "@babel/register": "^7.23.7",
     "chai": "^4.2.0",
-    "coveralls": "^3.0.9",
-    "cross-env": "^6.0.3",
+    "coveralls": "^3.1.1",
+    "cross-env": "^7.0.3",
     "mocha": "^6.2.2",
     "nyc": "^15.0.0",
     "pmock": "^0.2.3",
@@ -67,6 +67,6 @@
   },
   "homepage": "https://github.com/istanbuljs/babel-plugin-istanbul#readme",
   "engines": {
-    "node": ">=8"
+    "node": ">=12"
   }
 }