Consider defaulting `:process-shim` to false in template

[crteal]

In ClojureScript 1.9.854 a compiler option was added that shims the Node process object automatically (i.e., it is an opt-out feature). This means that if you are using environment variables in your Lambda functions they will get completely wiped out by the shim. It would be wonderful if the template automatically provided the compiler option with a value of false going forward.