v1.5.0

Added VPN Tunnel Phase 1/2 Lifetimes @jpschafer (#55)

## what

Added Tunnel 1/2 Phase 1/2 Lifetime Variables

why

So I can add custom lifetimes outside of the defaults for customers who have different lifetimes set for their end of the tunnel.

references

#54

https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/vpn_connection#tunnel1_phase1_lifetime_seconds

The only issue to note is that in the AWS Console, you will see 28800 and 3600 respectively instead of "default" for each. I wasn't sure If that really matters but it's the only issue I could think of. I'm open to suggestions on preferences regarding this variable that is technically optional. I wasn't sure if setting it to null would create the same behavior.