Returns a snapshot of the environment variables at invocation as a simple object of keys and values.

Deno.env.set("TEST_VAR", "A");
const myEnv = Deno.env.toObject();
console.log(myEnv.SHELL);
Deno.env.set("TEST_VAR", "B");
console.log(myEnv.TEST_VAR);  // outputs "A"

Requires allow-env permission.