Update for Spigot API v1.11.2-R0.1-SNAPSHOT and Java 8.#17

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Commits on May 25, 2017

Update for Spigot API v1.11.2-R0.1-SNAPSHOT and Java 8.
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Commits on May 26, 2017

Update for Spigot API v1.12-pre5-SNAPSHOT.
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