chore: update versions on beta channel (#9)

Author: scarmuega

.gitmodules

@@ -98,3 +98,7 @@
 [submodule "protocols/txpipe-protocols"]
 	path = protocols/txpipe
 	url = git@github.com:open-tx3/txpipe-protocols.git
+[submodule "backends/dolos"]
+	path = backends/dolos
+	url = git@github.com:txpipe/dolos.git
+	branch = main

backends/dolos

@@ -15,7 +15,7 @@
       "description": "The tx3 compiler",
       "repo_name": "tx3",
       "repo_owner": "tx3-lang",
-      "version": "^0.20.0"
+      "version": "^0.21.0"
     },
     {
       "name": "trix",
@@ -29,14 +29,14 @@
       "description": "An MCP server exposing the tx3 toolchain to AI agents and editors",
       "repo_name": "tx3-mcp",
       "repo_owner": "tx3-lang",
-      "version": "^0.3"
+      "version": "^0.4"
     },
     {
       "name": "tx3-lsp",
       "description": "A language server for tx3",
       "repo_name": "tx3-lsp",
       "repo_owner": "tx3-lang",
-      "version": "^0.8"
+      "version": "^0.9"
     },
     {
       "name": "dolos",