Returns a snapshot of the environment variables at invocation. Mutating a property in the object will set that variable in the environment for the process. The environment object will only accept strings as values.

  console.log(Deno.env("SHELL"));
  const myEnv = Deno.env();
  console.log(myEnv.SHELL);
  myEnv.TEST_VAR = "HELLO";
  const newEnv = Deno.env();
  console.log(myEnv.TEST_VAR == newEnv.TEST_VAR);