option to disable haveibeenpwned api

[lachlan-00]

I can't use the internet where i'm installing passcore and it looks to me that it's required for the password hash search

https://github.com/unosquare/passcore/blob/master/src/PwnedPasswordsSearch/PwnedSearch.cs

it's also a bad idea to log any exception (like lack of internet) as a failure. this makes non-internet installs useless without manually rebuilding

[simonai1254]

Please have a look at #605, this should be related to you issue. I did downgrade to 4.2.3 to not need to rebuild the solution...

[stale]

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