Support glam 0.18 (#760)

Author: repi

Cargo.lock

@@ -12,7 +12,7 @@ bitflags = "1.2.1"
 num-traits = { version = "0.2.14", default-features = false, features = ["libm"] }
 spirv-types = { path = "./shared", version = "0.4.0-alpha.12" }
 spirv-std-macros = { path = "./macros", version = "0.4.0-alpha.12" }
-glam = { version = "0.17.0", default-features = false, features = ["libm"], optional = true }
+glam = { version = ">=0.17, <=0.18", default-features = false, features = ["libm"], optional = true }
 
 [features]
 default = []