refactor!: Use vector_math 32 instead of 64 (#96)

# Description

Related to flame-engine/flame#3405

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Author: renancaraujo

packages/forge2d/lib/src/vector_math.dart

@@ -1,2 +1,2 @@
-export 'package:vector_math/vector_math_64.dart'
+export 'package:vector_math/vector_math.dart'
     show Vector2, Matrix2, Vector3, Matrix3;