Tests: Add test for creating different GMTProjection's.

tests/GMTProjection

@@ -0,0 +1,18 @@
+# Description: Projections test
+# Status: ok
+# Output hash: 18656de8c59c9a218b71dc730a3a1e8f1016179622392b11f052c64210f6fa2d
+@use "gmt"
+
+r=Region("130",150,30,50);
+
+px=Projection("dec",10,(10,20,10,20),15);
+p=Projection(r,type="cyl equid",h=10,stpar=0);
+p1=Projection(p,type="m",w=10);
+p2b=Projection("ob",10,r,"eq",(r.xe.n+r.xb.n)/2,(r.ye.n+r.yb.n)/2,140,15);
+p2=Projection(p2b,he=10);
+p3=Projection("cas",11,r);
+p4=Projection(r,type="cequa",11);
+p5=Projection(p4,type="j",centralm="130:30");
+p6=Projection("cylstereo",10,r);
+
+print(px,p,p1,p2,p3,p4,p5,p6);