Update gitignore (sorry)

electron/node_modules/ensure-error/index.d.ts

@@ -0,0 +1,36 @@
+declare namespace ensureError {
+	interface NonError extends Error {
+		name: 'NonError';
+	}
+}
+
+// IfAny<T, ThenType, ElseType> resolves to ThenType if T is `any` and resolves to ElseType otherwise
+// https://stackoverflow.com/a/49928360/4135063
+type IfAny<T, ThenType, ElseType> = 0 extends (1 & T) ? ThenType : ElseType;
+
+/**
+Ensures a value is a valid error by making it one if not.
+
+If `input` is an `Error`, any missing `Error` properties will be added.
+If it's not an `Error`, `input` is converted to an `Error`.
+
+@example
+```
+import ensureError = require('ensure-error');
+
+const error = new TypeError('🦄');
+error.name = '';
+
+console.log(error.name);
+//=> ''
+
+console.log(ensureError(error).name);
+//=> 'TypeError'
+
+console.log(ensureError(10));
+//=> [NonError: 10]
+```
+*/
+declare function ensureError<T>(input: T): IfAny<T, Error, T extends Error ? T : ensureError.NonError>;
+
+export = ensureError;