update ckb version (#80)

* update ckb version

* 121.0-rc2 test

* 121.0-rc2 test

* Update download.py

---------

Co-authored-by: 15168316096 <[email protected]>

Author: gpBlockchain

download.py

@@ -24,6 +24,7 @@
     "0.118.0",
     "0.119.0",
     "0.120.0",
+    "0.121.0",
 ]  # Replace with your versions
 
 DOWNLOAD_DIR = "download"

framework/test_node.py

@@ -18,27 +18,34 @@ class CkbNodeConfigPath(Enum):
         "source/template/ckb/v120/ckb.toml.j2",
         "source/template/ckb/v120/ckb-miner.toml.j2",
         "source/template/ckb/v120/specs/dev.toml",
-        "download/0.120.0",
+        "download/0.121.0",
     )
     TESTNET = (
         "source/template/ckb/v120/ckb.toml.j2",
         "source/template/ckb/v120/ckb-miner.toml.j2",
         "source/template/specs/testnet.toml.j2",
-        "download/0.120.0",
+        "download/0.121.0",
     )
 
     CURRENT_MAIN = (
         "source/template/ckb/v120/ckb.toml.j2",
         "source/template/ckb/v120/ckb-miner.toml.j2",
         "source/template/specs/mainnet.toml.j2",
-        "download/0.120.0",
+        "download/0.121.0",
     )
 
     PREVIEW_DUMMY = (
         "source/template/ckb/v120/ckb.toml.j2",
         "source/template/ckb/v120/ckb-miner.toml.j2",
         "source/template/specs/preview_dev.toml",
-        "download/0.120.0",
+        "download/0.121.0",
+    )
+
+    v121 = (
+        "source/template/ckb/v120/ckb.toml.j2",
+        "source/template/ckb/v120/ckb-miner.toml.j2",
+        "source/template/ckb/v120/specs/dev.toml",
+        "download/0.121.0",
     )
 
     v120 = (