fix: Loosen constraints on vector_math to ^2.1.4 (#108)

# Description

Loosen constraints on vector_math to ^2.1.4

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Author: spydon

packages/forge2d/pubspec.yaml

@@ -9,7 +9,7 @@ environment:
 
 dependencies:
   meta: ^1.16.0
-  vector_math: ^2.2.0
+  vector_math: ^2.1.4
   web: ^1.1.1
 
 dev_dependencies: