Updated references (again) to capture the new commit hash of the
Efabless sky130_fd_pr, which fixed the include file references to
the NPN device models.

VERSION

diff --git a/VERSION b/VERSION
index 79d76bb..a349155 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.454
+1.0.455

gf180mcu/gf180mcu.json

diff --git a/gf180mcu/gf180mcu.json b/gf180mcu/gf180mcu.json
index fe894c7..653743c 100644
--- a/gf180mcu/gf180mcu.json
+++ b/gf180mcu/gf180mcu.json
@@ -89,7 +89,7 @@
         "magic": "MAGIC_COMMIT"
     },
     "reference": {
-        "open_pdks": "559a117b163cef2f920f33f30f6f690aa0b47e4c",
+        "open_pdks": "392b92efc2a0be83c1381e739abaf48cc6135c7e",
         "magic": "610c86a2340701e49ac23654f81233bedf6724fa",
         "gf180mcu_pdk": "a897aa30369d3bcec87d9d50ce9b01f320f854ef",
         "gf180mcu_fd_pr": "9f7a3d4dcd4db06014f8cd648753ed1c8c69a1cf",

sky130/sky130.json

diff --git a/sky130/sky130.json b/sky130/sky130.json
index 645f892..1a1f1ce 100644
--- a/sky130/sky130.json
+++ b/sky130/sky130.json
@@ -94,9 +94,9 @@
         "magic": "MAGIC_COMMIT"
     },
     "reference": {
-        "open_pdks": "559a117b163cef2f920f33f30f6f690aa0b47e4c",
+        "open_pdks": "392b92efc2a0be83c1381e739abaf48cc6135c7e",
         "magic": "610c86a2340701e49ac23654f81233bedf6724fa",
-        "sky130_fd_pr": "69cccc2e35cbd9e678d8feeda4a237f9c43d0f8d",
+        "sky130_fd_pr": "0187549b9196b3eadd494b52c7c0333185956764",
         "sky130_fd_io": "2b8ce839a273734b2b1ec51b632c948f31814eb5",
         "sky130_fd_sc_hs": "51e41a54135f6f345f415f1f7a19c59a4d363c23",
         "sky130_fd_sc_ms": "70ba6f4ac3cc06a1f740326556386baacf8aba7b",
@@ -105,12 +105,12 @@
         "sky130_fd_sc_hd": "008ea7938fb2614ca64b559a7ca387d80e7f55b7",
         "sky130_fd_sc_hdll": "3db78f5defcf0b6a5c85cfe10921852d504900be",
         "sky130_fd_sc_hvl": "c7e80a4802fc1df49b007b99d4a1f61120e3a37f",
-        "sky130_osu_sc_t12": "unknown",
-        "sky130_osu_sc_t15": "unknown",
-        "sky130_osu_sc_t18": "unknown",
-        "sky130_sram_macros": "unknown",
+        "sky130_osu_sc_t12": "ac90ef0c622a9377a16b5218d9da3ac4169eeaaf",
+        "sky130_osu_sc_t15": "95d1c19abb47e1b2945847acb4e817b1b8417c43",
+        "sky130_osu_sc_t18": "aa2b509f3c8f32ea94fdb55ac9768754667c1658",
+        "sky130_sram_macros": "c2333394e0b0b9d9d71185678a8d8087715d5e3b",
         "sky130_fd_bd_sram": "be33adbcf188fdeab5c061699847d9d440f7a084",
-        "sky130_fd_pr_reram": "unknown",
+        "sky130_fd_pr_reram": "d6d2a3c6960aac0a0b12fc21221c31777bbf284d",
         "sky130_ml_xx_hd": "6eb3b0718552b034f1bf1870285ff135e3fb2dcb",
         "xschem_sky130": "6f398652608d2bb0a380bdd7a4d1b4f8c87672b0",
         "klayout_sky130": "c4b125f216edda5d755e429cfe876855ff300974",