Change compressor (zarr v2) to compressors (zarr v3) (#1657)

* change compressor (zarr v2) to compressors (zarr v3)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: leewujung

echopype/tests/echodata/test_echodata_combine.py

@@ -402,7 +402,8 @@ def test_combined_encodings(ek60_test_data):
 
     combined = echopype.combine_echodata(eds)
 
-    encodings_to_drop = {'chunks', 'preferred_chunks', 'compressor', 'filters'}
+    # TODO: lazy_encodings is empty in this current test, so test not actually functioning?
+    encodings_to_drop = {'chunks', 'preferred_chunks', 'compressors', 'filters'}
 
     group_checks = []
     for _, value in combined.group_map.items():

echopype/utils/coding.py

@@ -17,10 +17,14 @@
 COMPRESSION_SETTINGS = {
     "netcdf4": {"zlib": True, "complevel": 4},
     "zarr": {
-        "float": {"compressor": BloscCodec(cname="zstd", clevel=3, shuffle="bitshuffle")},
-        "int": {"compressor": BloscCodec(cname="lz4", clevel=5, shuffle="shuffle", blocksize=0)},
-        "string": {"compressor": BloscCodec(cname="lz4", clevel=5, shuffle="shuffle", blocksize=0)},
-        "time": {"compressor": BloscCodec(cname="lz4", clevel=5, shuffle="shuffle", blocksize=0)},
+        "float": {"compressors": [BloscCodec(cname="zstd", clevel=3, shuffle="bitshuffle")]},
+        "int": {"compressors": [BloscCodec(cname="lz4", clevel=5, shuffle="shuffle", blocksize=0)]},
+        "string": {
+            "compressors": [BloscCodec(cname="lz4", clevel=5, shuffle="shuffle", blocksize=0)]
+        },
+        "time": {
+            "compressors": [BloscCodec(cname="lz4", clevel=5, shuffle="shuffle", blocksize=0)]
+        },
     },
 }