revert to ESLint 8 (#231)

Co-authored-by: Stefano Ricci <[email protected]>

.eslintignore

@@ -0,0 +1,2 @@
+node_modules
+**/jsep.ts

.eslintrc

@@ -0,0 +1,26 @@
+{
+  "env": {
+    "es6": true,
+    "node": true,
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 2021,
+    "sourceType": "module",
+  },
+  "plugins": ["@typescript-eslint", "eslint-plugin-no-explicit-type-exports"],
+  "settings": {
+    "import/resolver": {
+      "node": {
+        "extensions": [".js", ".jsx", ".ts", ".tsx"],
+      },
+    },
+  },
+  "rules": {
+    "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_", "varsIgnorePattern": "^_" }],
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/ban-ts-ignore": "off",
+    "no-explicit-type-exports/no-explicit-type-exports": 2,
+  },
+}

package.json

@@ -11,25 +11,24 @@
   "license": "MIT",
   "devDependencies": {
     "@babel/preset-typescript": "^7.24.7",
-    "@eslint/js": "^9.4.0",
     "@types/jest": "^29.5.12",
     "@types/lodash.differencewith": "^4.5.9",
     "@types/lodash.frompairs": "^4.0.9",
     "@types/lodash.isequal": "^4.5.8",
     "@types/lodash.topairs": "^4.3.9",
     "@types/proj4": "^2.5.5",
     "@types/uuid": "^9.0.8",
-    "@typescript-eslint/eslint-plugin": "^7.13.0",
-    "@typescript-eslint/parser": "^7.13.0",
-    "eslint": "^9.4.0",
+    "@typescript-eslint/eslint-plugin": "^6.7.0",
+    "@typescript-eslint/parser": "^6.7.0",
+    "eslint": "^8.49.0",
+    "eslint-plugin-no-explicit-type-exports": "^0.12.1",
     "husky": "^9.0.11",
     "jest": "^29.7.0",
-    "lint-staged": "^15.2.7",
+    "lint-staged": "^14.0.1",
     "npm-run-all": "^4.1.5",
     "prettier": "3.3.2",
     "ts-jest": "^29.1.4",
-    "typescript": "^5.4.5",
-    "typescript-eslint": "^7.13.0"
+    "typescript": "^5.4.5"
   },
   "dependencies": {
     "@jsep-plugin/regex": "^1.0.3",