GLM 0.9.9.8

Features:

• Added GLM_EXT_vector_intX* and GLM_EXT_vector_uintX* extensions
• Added GLM_EXT_matrix_intX* and GLM_EXT_matrix_uintX* extensions

Improvements:

• Added clamp, repeat, mirrorClamp and mirrorRepeat function to GLM_EXT_scalar_commond and GLM_EXT_vector_commond extensions with tests

Fixes:

• Fixed unnecessary warnings from matrix_projection.inl #995
• Fixed quaternion slerp overload which interpolates with extra spins #996
• Fixed for glm::length using arch64 #992
• Fixed singularity check for quatLookAt #770