Use old shader versions

@rexim is running is program on a potato

src/boomer.fs

@@ -1,6 +1,6 @@
-#version 330 core
-out vec4 color;
-in vec2 texcoord;
+#version 130
+out mediump vec4 color;
+in mediump vec2 texcoord;
 uniform sampler2D tex;
 void main()
 {

src/boomer.vs

@@ -1,6 +1,6 @@
-#version 330 core
-layout (location = 0) in vec3 aPos;
-layout (location = 1) in vec2 aTexCoord;
+#version 130
+in vec3 aPos;
+in vec2 aTexCoord;
 out vec2 texcoord;
 uniform mat4 transform;
 void main()