SConstruct : Bumped version to 10.5.18.0

Author: ivanimanishi

SConstruct

@@ -54,7 +54,7 @@ SConsignFile()
 
 ieCoreMilestoneVersion = 10 # for announcing major milestones - may contain all of the below
 ieCoreMajorVersion = 5 # backwards-incompatible changes
-ieCoreMinorVersion = 17 # new backwards-compatible features
+ieCoreMinorVersion = 18 # new backwards-compatible features
 ieCorePatchVersion = 0 # bug fixes
 ieCoreVersionSuffix = "" # used for alpha/beta releases. Example: "a1", "b2", etc.