chore(ts): moving to TypeScript 6 (#117)

Author: arnobl

package-lock.json

@@ -67,16 +67,17 @@
     "rollup-plugin-esbuild": "6.2.1",
     "ts-jest": "29.4.9",
     "typedoc": "0.28.19",
-    "typescript": "5.9.3",
+    "typescript": "6.0.3",
     "typescript-eslint": "8.59.0",
-    "@typescript/native-preview": "^7.0.0-dev.20260420.1"
+    "@typescript/native-preview": "^7.0.0-dev.20260427.1"
   },
   "scripts": {
     "package": "npm run pre-build && npm run build && npm run doc",
     "build": "rollup -c",
     "generate-barrels": "barrelsby -c ./barrelsby-config.json --delete",
     "compile": "tsc",
     "compile-native": "tsgo",
+    "compile-test-native": "tsgo -p tsconfig.test.json",
     "compile-test": "tsc -p tsconfig.test.json",
     "pre-build": "npm run clean && npm run generate-barrels && npm run compile && npm run lint && npm run compile-test && npm run coverage",
     "clean": "(rm -rf dist out-test coverage .stryker-tmp)",

package.json

@@ -25,8 +25,7 @@ export class StubTransitionOK<E extends Event> extends TransitionBase<E> {
         this._guard = guard ?? true;
     }
 
-    // eslint-disable-next-line @typescript-eslint/no-unused-vars
-    public accept(event: Event): event is E {
+    public accept(_ignore: Event): _ignore is E {
         return true;
     }
 

test/fsm/StubTransitionOk.ts

@@ -1,7 +1,9 @@
 {
   "extends": "./tsconfig.base.json",
   "compilerOptions": {
-    "outDir": "out-test"
+    "rootDir": ".",
+    "outDir": "out-test",
+    "ignoreDeprecations": "6.0"
   },
   "include": [
     "test/**/*"