Fixed ResourceOption deepcopy bug in stack_reference.py

[solidDoWant]

Replaced copy statements with ResourceOptions.merge in stack_reference.py. If a set of ResourceOptions is passed with parent set then the resource creation fails due to deepcopy failing.

Minimum code to reproduce:

from typing import Optional
from pulumi import ResourceOptions, StackReference, ComponentResource

class SomeComponent(ComponentResource):
    def __init__(self, name: str, stack_name: str, opts: Optional[ResourceOptions] = None):
        super().__init__("some_component", name, {}, opts)

        self.stack_reference: StackReference = StackReference(
            name = f"{name}-stack_reference",
            opts = ResourceOptions(parent=self),
            stack_name = stack_name
        )

stack_name: str = "REDACTED"

SomeComponent("example_of_problem", stack_name)

[solidDoWant]

Anybody know why Travis is failing the pre-install tasks? Looks like it's trying to download something from a site with an expired cert.

Looks like yarn's website cert expired or something, it's passing now

[lukehoban]

Thanks!