Update reqs

Author: amykyta3

setup.py

@@ -30,7 +30,7 @@
         "systemrdl-compiler >= 1.26.0, < 2",
         "peakrdl-html >= 2.10.1, < 3",
         "peakrdl-ipxact >= 3.4.1, < 4",
-        "peakrdl-regblock >= 0.15.0",
+        "peakrdl-regblock >= 0.18.0",
         "peakrdl-systemrdl >= 0.3.0",
         "peakrdl-uvm >= 2.3.0, < 3",
         "tomli;python_version<'3.11'"