Fix TypeScript 2.9 build

In TypeScript 2.9 the constraint of `keyof T` is now `string | number | symbol`. This is not compatible with the type of the `event` parameter in `EventEmitter` methods, which is `string | symbol`. The compiler option `--keyofStringsOnly` reverts to TypeScript's old `keyof T` contraint, and has been added to `tsconfig.json` to resolve this breaking change. More info: microsoft/TypeScript#23724
KevinSnyderCodes · Jun 25, 2018 · 254868f · 254868f
1 parent 779c33d
commit 254868f
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Showing 3 changed files with 6 additions and 5 deletions.
diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -28,6 +28,6 @@
     "rimraf": "^2.6.2",
     "sinon": "^5.0.10",
     "ts-node": "^6.0.5",
-    "typescript": "^2.8.3"
+    "typescript": "^2.9.2"
   }
 }
diff --git a/tsconfig.json b/tsconfig.json
@@ -7,7 +7,8 @@
     "module": "commonjs",
     "declaration": true,
     "outDir": "./lib",
-    "strict": true
+    "strict": true,
+    "keyofStringsOnly": true
   },
   "exclude": [
       "./lib",