Update glm to 1.0.1 (#819)

* Update glm to 1.0.1

* Define GLM_ENABLE_EXPERIMENTAL for glm/gtx/quaternion.hpp

With GLM 1:

In file included from manifold/manifold/src/manifold/src/smoothing.cpp:15:
manifold/manifold/build/_deps/glm-src/glm/gtx/quaternion.hpp:24:3: error: "GLM: GLM_GTX_quaternion is an experimental extension
  and may change in the future. Use #define GLM_ENABLE_EXPERIMENTAL before including it, if you really want to use it."

manifoldDeps.cmake

@@ -47,7 +47,7 @@ if(NOT glm_FOUND)
     set(GLM_BUILD_INSTALL "ON" CACHE STRING "")
     FetchContent_Declare(glm
         GIT_REPOSITORY https://github.com/g-truc/glm.git
-        GIT_TAG b06b775c1c80af51a1183c0e167f9de3b2351a79
+        GIT_TAG 1.0.1
         GIT_PROGRESS TRUE
     )
     FetchContent_MakeAvailable(glm)

src/manifold/src/smoothing.cpp

@@ -12,6 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#define GLM_ENABLE_EXPERIMENTAL
 #include <glm/gtx/quaternion.hpp>
 
 #include "impl.h"