update version to 4.1.5

extra/CHANGES.txt

@@ -1,4 +1,4 @@
-2020-XX-XX 4.1.5:
+2020-12-31 4.1.5:
 
 	General improvements:
 

opam

@@ -1,6 +1,6 @@
 opam-version: "2.0"
 name: "haxe"
-version: "4.1.4"
+version: "4.1.5"
 synopsis: "Multi-target universal programming language"
 description: """
 Haxe is an open source toolkit based on a modern,

src/core/globals.ml

@@ -24,7 +24,7 @@ type platform =
 	| Hl
 	| Eval
 
-let version = 4104
+let version = 4105
 let version_major = version / 1000
 let version_minor = (version mod 1000) / 100
 let version_revision = (version mod 100)