Updating trunk VERSION from 4117.0 to 4118.0

# This is an automated release commit.
# Do not revert without consulting chrome-pmo@google.com.
NOAUTOREVERT=true
TBR=mmoss@chromium.org

Change-Id: I8a538c535fb1f9615c361dc7048b41bd00d5f548
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2153944Reviewed-by: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#759919}

chrome/VERSION

 MAJOR=84
 MINOR=0
-BUILD=4117
+BUILD=4118
 PATCH=0