in isJsDom there is no check on navigator.userAgent

even using 2.1.1 logic, when i run it in node (alpine14), i get the following error:

```
(navigator.userAgent.includes("Node.js") ||
^
TypeError: Cannot read property 'includes' of undefined
```
when i evaluate each part, i can see these various values:
```typeof window !== "undefined"```
true

```window.name === "nodejs"```
false

therefore,
```(typeof window !== "undefined" && window.name === "nodejs")```
is false

so, one would think it would short circuit, but for some reason it continues on to the OR where

```typeof navigator !== "undefined"```
is true

because

navigator is an object with
```{appName: 'nodejs'}```

but then it blows up here because there i no userAgent:

```navigator.userAgent.includes("Node.js")```
Uncaught TypeError TypeError: Cannot read property 'includes' of undefined

so, it seems like the checks are not preventing it from trying to access a property on an undefined object (navigator.userAgent). would appreciate if you could identify a way to make this work for me. we are using bitgo_service which uses your code. not sure how this works for others and not for me, but i can override the dependency of the current bitgo version we are using, if you can create an updated package.

many thanks!