Revert "Bump dependency versions and fix signed/unsigned comparison"

This reverts commit 5ac4a18.

Author: Dave Allison

MODULE.bazel

@@ -1,14 +1,14 @@
 module(
     name = "cpp_toolbelt",
-    version = "2.0.2",
+    version = "2.0.1",
 )
 
-bazel_dep(name = "platforms", version = "1.0.0")
+bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "bazel_skylib", version = "1.9.0")
 bazel_dep(name = "abseil-cpp", version = "20250814.1")
 bazel_dep(name = "googletest", version = "1.17.0.bcr.2")
-bazel_dep(name = "coroutines", version = "3.2.1")
-bazel_dep(name = "rules_cc", version = "0.2.17")
+bazel_dep(name = "coroutines", version = "3.1.0")
+bazel_dep(name = "rules_cc", version = "0.2.16")
 
 # For local debugging of co coroutine library.
 # local_path_override(