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/.github/ISSUE_TEMPLATE/10-feature_request.yml

@@ -10,21 +10,21 @@ body:
       description: We recommend using the latest commit from GitHub in your projects.
     validations:
       required: true
- - type: textarea
+  - type: textarea
     id: why
     attributes:
       label: Why do we need this feature?
       description: Ideally, explain why a combination of existing features cannot be used instead.
     validations:
       required: true
- - type: textarea
+  - type: textarea
     id: proposal
     attributes:
       label: Describe the proposal.
       description: Include a detailed description of the feature, with usage examples.
     validations:
       required: true
- - type: textarea
+  - type: textarea
     id: platform
     attributes:
       label: Is the feature specific to an operating system, compiler, or build system version?

test/googletest/.github/workflows/gtest-ci.yml

@@ -1,43 +0,0 @@
-name: ci
-
-on:
-  push:
-  pull_request:
-
-env:
-  BAZEL_CXXOPTS: -std=c++14
-
-jobs:
-  Linux:
-    runs-on: ubuntu-latest
-    steps:
-
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 0
-
-    - name: Tests
-      run: bazel test --cxxopt=-std=c++14 --features=external_include_paths --test_output=errors ...
-
-  macOS:
-    runs-on: macos-latest
-    steps:
-
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 0
-
-    - name: Tests
-      run:  bazel test --cxxopt=-std=c++14 --features=external_include_paths --test_output=errors ...
-
-
-  Windows:
-    runs-on: windows-latest
-    steps:
-
-    - uses: actions/checkout@v3
-      with:
-        fetch-depth: 0
-
-    - name: Tests
-      run: bazel test --cxxopt=/std:c++14 --features=external_include_paths --test_output=errors ...