Updated Upstream (Bukkit/CraftBukkit/Spigot)

Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
c7c11188 SPIGOT-2620: Add Player#sendBlockChanges()
f63d2b44 Improve annotation test on parameters
3372e7b4 SPIGOT-1244, SPIGOT-6860, SPIGOT-6874: Various Javadoc and formatting fixes
a1e8a9ab PR-793: Ignore .checkstyle file generated by Eclipse IDE

CraftBukkit Changes:
c2c39089e SPIGOT-2620: Add Player#sendBlockChanges()
8209158db PR-1113: Ignore .checkstyle file generated by Eclipse IDE

Spigot Changes:
4aa5ead2 Rebuild patches

patches/api/0001-Convert-project-to-Gradle.patch

@@ -8,7 +8,7 @@ apply if there are changes made to it from upstream - thus notifying us
 that changes were made.
 
 diff --git a/.gitignore b/.gitignore
-index e431e3435737e28394d81b56568a08b3c3148b9b..b23bde3b5e881f146539a307d0a59f2177b6a036 100644
+index 11038da2e071699d6561a331565db0c8d7850d0e..317acfec5894101294a55abff61819431e6a5e65 100644
 --- a/.gitignore
 +++ b/.gitignore
 @@ -1,3 +1,5 @@
@@ -17,7 +17,7 @@ index e431e3435737e28394d81b56568a08b3c3148b9b..b23bde3b5e881f146539a307d0a59f21
  # Eclipse stuff
  /.classpath
  /.project
-@@ -30,3 +32,7 @@
+@@ -31,3 +33,7 @@
  *.ipr
  *.iws
  .idea/