Fix bazel build, and commit module lock file.

Including:
- Remove WORKSPACE and upgrade to MODULE.bazel.
- The integration tests were not included since the directory was misspelled.
- Their header files were not accessible.

WORKSPACE

-workspace(name = "com_github_jbeder_yaml_cpp")
-
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
-http_archive(
-    name = "com_google_googletest",
-    strip_prefix = "googletest-release-1.8.1",
-    url = "https://github.com/google/googletest/archive/release-1.8.1.tar.gz",
-    sha256 = "9bf1fe5182a604b4135edc1a425ae356c9ad15e9b23f9f12a02e80184c3a249c",
-)

test/BUILD.bazel

+package(default_visibility = ["//test:__subpackages__"])
+
+cc_library(
+    name = "mock_event_handler",
+    hdrs = ["mock_event_handler.h"],
+    strip_include_prefix = "//test",
+)
+
+cc_library(
+    name = "specexamples",
+    hdrs = ["specexamples.h"],
+    strip_include_prefix = "//test",
+)
+
 cc_test(
     name = "test",
     srcs = glob([
         "*.cpp",
-        "*.h",
-        "integrations/*.cpp",
         "node/*.cpp",
     ]),
     deps = [
+        ":mock_event_handler",
+        ":specexamples",
         "//:yaml-cpp",
         "//:yaml-cpp_internal",
-        "@com_google_googletest//:gtest_main",
+        "@googletest//:gtest_main",
     ],
 )

test/integration/BUILD.bazel

+cc_test(
+    name = "test",
+    srcs = glob([
+        "*.cpp",
+        "*.h",
+    ]),
+    deps = [
+        "//:yaml-cpp",
+        "//:yaml-cpp_internal",
+        "//test:mock_event_handler",
+        "//test:specexamples",
+        "@googletest//:gtest_main",
+    ],
+)