project: Remove usage and dependency tslib.

It was only used with the spread operator in the tests files,
so it's fine to embed the lib code instead of depending on tslib
as a peer dependency.

package.json

@@ -46,10 +46,8 @@
  "lint:fix": "npm run lint -- --fix",
  "docs": "typedoc --options config/typedoc.json"
  },
- "peerDependencies": {
- "tslib": ">=2.0.0"
- },
  "dependencies": {},
+ "peerDependencies": {},
  "devDependencies": {
  "@babel/core": "^7.23.9",
  "@babel/polyfill": "^7.12.1",
@@ -69,7 +67,6 @@
  "rollup-plugin-sourcemaps": "^0.6.3",
  "shx": "^0.3.4",
  "ts-jest": "^29.1.2",
- "tslib": "^2.6.2",
  "tslint": "^6.1.3",
  "tslint-config-prettier": "^1.18.0",
  "tslint-config-standard": "^9.0.0",
@@ -78,4 +75,4 @@
  "typedoc-neo-theme": "^1.1.1",
  "typescript": "^4.9.5"
  }
-}
+}

tsconfig.json

@@ -20,7 +20,7 @@
  "outDir": "dist/esm5",
  "resolveJsonModule": true,
  "useUnknownInCatchVariables": false,
- "importHelpers": true
+ "importHelpers": false
  },
  "include": [
  "./src"