Update relavent files to glsl version 4.5

shaders/quad_fragment.glsl

@@ -1,5 +1,4 @@
-#version 430
-precision highp float;
+#version 450 core
 
 out vec4 frag_color;
 

shaders/quad_vertex.glsl

@@ -1,4 +1,5 @@
-#version 430
+#version 450 core
+
 layout(location = 0) in vec3 pos_attrib; //this variable holds the position of mesh vertices
 layout(location = 1) in vec2 tex_coord_attrib;
 layout(location = 2) in vec3 normal_attrib;