Nexus Check Filter

[dallendalton]

There are scenarios where merchants may need to dynamically alter the nexus check logic. For instance adding additional international nexus areas. Currently there is no way for that to be accomplished. This PR adds a filter to allow these customizations.

Click-Test Versions

• [X] Woo 4.5
• [X] Woo 4.4
• [X] Woo 4.3
• [X] Woo 4.2
• [X] Woo 4.1
• [X] Woo 4.0
• [X] Woo 3.9
• [X] Woo 3.8
• [X] Woo 3.7
• [X] Woo 3.6
• [X] Woo 3.5
• [X] Woo 3.4
• [X] Woo 3.3
• [X] Woo 3.2

Specs Passing

• [X] Woo 4.5
• [X] Woo 4.4
• [X] Woo 4.3
• [X] Woo 4.2
• [X] Woo 4.1
• [X] Woo 4.0
• [X] Woo 3.9
• [X] Woo 3.8
• [X] Woo 3.7
• [X] Woo 3.6
• [X] Woo 3.5
• [X] Woo 3.4
• [X] Woo 3.3
• [X] Woo 3.2