Update opcodes to match new ones

Some opcodes were changed to match the proposed ones on the
esolang wiki.

tests/labels.icasm

@@ -1,4 +1,4 @@
-ld @regA, 0              // jpt, jpf, eq, lt register
+ld @regA, 0              // jz, seq, lt register
 ld @counter, 10          // loop counter
 ld @lower, 0             // lower number
 ld @higher, 1            // higher number
@@ -8,6 +8,6 @@ add @higher, 0, @regB           // Move higher number to a storage point
 add @higher, @lower, @higher    // Add higher and lower number, and store in higher number slot
 add @regB, 0, @lower            // Move stored number to lower number slot
 add @counter, -1, @counter      // Subtract 1 from the loop counter
-eq @counter, 0, @regA           // Check if the loop counter is 0
-jpf @regA, Fibonacci + 1        // Loop the function if not
+seq @counter, 0, @regA          // Check if the loop counter is 0
+jz @regA, Fibonacci + 1         // Loop the function if not
 hlt                             // Otherwise, exit