Update googletest to 1.18.0 and SIMDe to 0.8.2.

Googletest 1.18 asks for CMake 3.13 or newer, so configuring the tests no longer warns that CMake compatibility below 3.10 is deprecated.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/googletest/googletest_deps.bzl

@@ -0,0 +1,44 @@
+"""Load dependencies needed to use the googletest library as a 3rd-party consumer."""
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("//:fake_fuchsia_sdk.bzl", "fake_fuchsia_sdk")
+
+def googletest_deps():
+    """Loads common dependencies needed to use the googletest library."""
+
+    if not native.existing_rule("re2"):
+        http_archive(
+            name = "re2",
+            sha256 = "87f6029d2f6de8aa023654240a03ada90e876ce9a4676e258dd01ea4c26ffd67",
+            strip_prefix = "re2-2025-11-05",
+            urls = ["https://github.com/google/re2/releases/download/2025-11-05/re2-2025-11-05.tar.gz"],
+        )
+
+    if not native.existing_rule("abseil-cpp"):
+        http_archive(
+            name = "abseil-cpp",
+            sha256 = "4c124408da902be896a2f368042729655709db5e3004ec99f57e3e14439bc1b2",
+            strip_prefix = "abseil-cpp-20260107.0",
+            urls = ["https://github.com/abseil/abseil-cpp/releases/download/20260107.0/abseil-cpp-20260107.0.tar.gz"],
+        )
+
+    if not native.existing_rule("bazel_features"):
+        http_archive(
+            name = "bazel_features",
+            sha256 = "9390b391a68d3b24aef7966bce8556d28003fe3f022a5008efc7807e8acaaf1a",
+            strip_prefix = "bazel_features-1.36.0",
+            url = "https://github.com/bazel-contrib/bazel_features/releases/download/v1.36.0/bazel_features-v1.36.0.tar.gz",
+        )
+
+    if not native.existing_rule("rules_cc"):
+        http_archive(
+            name = "rules_cc",
+            sha256 = "207ea073dd20a705f9e8bc5ac02f5203e9621fc672774bb1a0935aefab7aebfa",
+            strip_prefix = "rules_cc-0.2.8",
+            url = "https://github.com/bazelbuild/rules_cc/releases/download/0.2.8/rules_cc-0.2.8.tar.gz",
+        )
+
+    if not native.existing_rule("fuchsia_sdk"):
+        fake_fuchsia_sdk(
+            name = "fuchsia_sdk",
+        )