Update OTAPI things

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
ModFramework	nuget	patch	1.1.6 -> 1.1.7
OTAPI.Upcoming (source)	nuget	patch	3.1.16 -> 3.1.18
TerrariaServerAPI		digest	b2ed9e4 -> 20115d4

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