Prepare 4.2.0rc0

[G-D-Petrov]

Fix version

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[G-D-Petrov]

@conda-forge-admin, please rerender

[G-D-Petrov]

@conda-forge-admin, please rerender

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

This message was generated by GitHub actions workflow run https://github.com/conda-forge/arcticdb-feedstock/actions/runs/6981697583.

[G-D-Petrov]

@conda-forge-admin, please rerender

[jjerphan]

Thank you, @G-D-Petrov.

Here are a few suggestions of adaptations regarding recent changes on the feedstock and upstream.

[jjerphan]

We need to port the recent changes made in https://github.com/conda-forge/arcticdb-feedstock/pull/119/files#diff-ff61408cdc05bc9667deeadb55e4aaceb1371972076b6bf6934f9008920f2bd2R9-R22.

---

Need not be addressed: ideally we should couple versions of dependencies together to have two specification:

• the relaxed (i.e. pin-less) specification of libraries as on main
• the specific specification of libraries of libevent-2.1.10

I believe this is doable with zip_keys as follows:

   - "11.0"                 # [osx and x86_64]
 MACOSX_DEPLOYMENT_TARGET:  # [osx and x86_64]
   - "11.0"                 # [osx and x86_64]
-libevent:
-  - "2.1.10"
-  - "2.1.12"
 lmdb:
   - 0.9.22
 folly:
   # This version of folly is used to make the build usable by more environments
-  - "2023.09.25.00"	
+  - "2023.09.25.00"
+
+# Coupling dependencies specification together.
+# The first  lines come from the specifications of the `libevent-2.1.10` branch. 
+# The second lines come from the specifications of the `main` branch.
+# See: https://docs.conda.io/projects/conda-build/en/stable/resources/variants.html#coupling-keys
+libevent:
+  - "2.1.10"
+  - "2.1.12"
+aws_sdk_cpp:
+  - "1.10.57"
+  - "*"
+azure_core_cpp:
+  - "1.10.2"
+  - "*"
+azure_identity_cpp:
+  - "1.5.1"
+  - "*"
+azure_storage_blobs_cpp:
+  - "12.9.0"
+  - "*"
+zip_keys:
+  - libevent
+  - aws_sdk_cpp
+  - azure_core_cpp
+  - azure_identity_cpp
+  - azure_storage_blobs_cpp
 
 channel_targets:
   - conda-forge arcticdb_rc

[jjerphan]

Thanks to man-group/ArcticDB#1027 and to https://github.com/man-group/ArcticDB/pull/1005/files, the following python dependencies can be dropped:

• pymongo
• grpcio-tools
• xxhash
• six
• decorator
• prometheus_client

Unrelated but dataclasses which is needed for python < 3.8 can also be dropped since conda-forge only builds for python>=3.8.