Change shader versions from 1.10 to 3.30

Minimum OpenGL version is 3.3 Core, so it is reasonable to use GLSL 3.30

data/shaders/chunk.frag

@@ -1,6 +1,6 @@
-#version 110
+#version 330
 
-varying vec2 uv_p;
+in vec2 uv_p;
 
 void main(void) {
 	gl_FragColor = vec4(uv_p.xy, 0.5f, 1.0f);

data/shaders/chunk.vert

@@ -1,9 +1,9 @@
-#version 110
+#version 330
 
-attribute vec3 position;
-attribute vec3 normal;
-attribute vec2 uv;
-varying vec2 uv_p;
+in vec3 position;
+in vec3 normal;
+in vec2 uv;
+out vec2 uv_p;
 
 uniform mat4 projectionMatrix;
 uniform mat4 viewMatrix;

data/shaders/skybox.frag

@@ -1,6 +1,6 @@
-#version 110
+#version 330
 
-varying vec3 cardial_color;
+in vec3 cardial_color;
 
 void main(void) {
 	gl_FragColor = vec4(cardial_color.xyz, 1.0f);

data/shaders/skybox.vert

@@ -1,8 +1,8 @@
-#version 110
+#version 330
 
-attribute vec3 position;
-attribute vec3 color;
-varying vec3 cardial_color;
+in vec3 position;
+in vec3 color;
+out vec3 cardial_color;
 
 uniform mat4 projectionMatrix;
 uniform mat4 viewMatrix;