ci, tests: Initial HDF5 version 2 support (#94)

The relevant changes in HDF5 v2 are:
  - s/Z_LIB/ZLIB/ for CMake variables, e.g. `HDF5_ENABLE_ZLIB_SUPPORT`.
  - the default file version is 1.8 (not earliest).

As a result this commit:
  - Updates the CI to build against HDF5 v2.
  - Updates the test for default file version.
  - Silences a free space manager related test.

Author: holmesv3

.github/workflows/ci.yml

@@ -101,7 +101,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        hdf5_version : [ hdf5-1_8_23, hdf5-1_10_11, hdf5-1_12_3, hdf5_1.14.6 ]
+        hdf5_version : [ hdf5-1_8_23, hdf5-1_10_11, hdf5-1_12_3, hdf5_1.14.6, hdf5_2.0.0]
 
     steps:
     - uses: actions/checkout@v5
@@ -117,7 +117,7 @@ jobs:
         wget https://github.com/HDFGroup/hdf5/archive/refs/tags/${{ matrix.hdf5_version }}.tar.gz --output-document hdf5.tar.gz
         tar xf hdf5.tar.gz
         mkdir -p hdf5-${{ matrix.hdf5_version }}/BUILD && cd hdf5-${{ matrix.hdf5_version }}/BUILD
-        cmake .. -DCMAKE_BUILD_TYPE=Release -GNinja -DCMAKE_INSTALL_PREFIX=$HOME/${{ matrix.hdf5_version }} -DHDF5_ENABLE_Z_LIB_SUPPORT=ON -DUSE_LIBAEC=ON -DHDF5_BUILD_EXAMPLES=OFF -DBUILD_STATIC_LIBS=OFF -DBUILD_TESTING=OFF
+        cmake .. -DCMAKE_BUILD_TYPE=Release -GNinja -DCMAKE_INSTALL_PREFIX=$HOME/${{ matrix.hdf5_version }} -DHDF5_ENABLE_ZLIB_SUPPORT=ON -DHDF5_ENABLE_Z_LIB_SUPPORT=ON -DUSE_LIBAEC=ON -DHDF5_BUILD_EXAMPLES=OFF -DBUILD_STATIC_LIBS=OFF -DBUILD_TESTING=OFF
         ninja && ninja install
 
     - name: Build

tests/unit/tests_high_five_base.cpp

@@ -180,7 +180,11 @@ TEST_CASE("Test file version bounds") {
     {
         File file(file_name, File::Truncate);
         auto bounds = file.getVersionBounds();
+#if H5_VERSION_GE(2, 0, 0)
+        CHECK(bounds.first == H5F_LIBVER_V18);
+#else
         CHECK(bounds.first == H5F_LIBVER_EARLIEST);
+#endif
         CHECK(bounds.second == H5F_LIBVER_LATEST);
     }
 
@@ -630,7 +634,7 @@ TEST_CASE("FreeSpace (default)") {
     }
 }
 
-#if H5_VERSION_GE(1, 10, 1)
+#if H5_VERSION_GE(1, 10, 1) && !H5_VERSION_GE(2, 0, 0)
 TEST_CASE("FreeSpace (tracked)") {
     const std::string filename = "freespace_tracked.h5";
     const std::string ds_path = "dataset";