[VOTE] Release Apache DataSketches-java 3.0.0-RC1

[David Cromberge <da...@gmail.com>]

### Update dependency on Datasketches-memory to 2.0.0 enabling full
support for reading from and writing sketches to off-heap memory in
JDKs 8-13.

### MurmurHash3v2.java was moved out of Datasketches-java to
Datasketches-memory, and most deprecated API methods from 2.0.0 are
now also removed.

### Finally, the MemoryRequestServer changes and improvements from
Datasketches-memory have been integrated into the Datasketches-java
API.


Hello Apache DataSketches PMC and Community,

1. This is a call for vote to release Apache DataSketches-java candidate
version:  3.0.0-RC1

    NOTE 1: This is the core Java component of the DataSketches library
that includes all the sketch algorithms in production-ready packages. These
sketches can be called directly from this component or used in conjunction
with the adaptor components such as Apache Pig, Apache Hive, or the
aggregator adaptors built into Apache Druid.

2. Source repository:
    - https://github.com/apache/datasketches-java

    Git Tag for this release:
    - https://github.com/apache/datasketches-java/tree/3.0.0-RC1 on branch
3.0.X

    Git HashId for this release starts with: b6f09477

3. The Release Candidate / Zip Repository:
    - https://dist.apache.org/repos/dist/dev/datasketches/java/3.0.0-RC1/

    The public signing key can be found in the KEYS file:
    - https://dist.apache.org/repos/dist/dev/datasketches/KEYS

    The artifacts have been signed with --keyid-format SHORT : A21C4E36

4. Repository: Maven Central [Nexus](http://repository.apache.org) (Jar
Artifacts):
    -https://repository.apache.org/content/groups/staging/org/apache/datasketches/datasketches-java/3.0.0/

5. Build & Test Guide:
    - https://github.com/apache/datasketches-java/blob/3.0.0-RC1/README.md

6. The vote will be performed as follows:
   - This letter will be published on dev@ and remain open for at least 72
hours (excluding weekends and holidays), AND until at least 3 (+1) PMC
votes or a majority of (+1) PMC votes are acquired. Anyone in the community
can vote.

Please vote accordingly:

[ ] +1 approve
[ ] +0 no opinion
[ ] -1 disapprove with the reason

Thanks,
David Crombergedcromberge@apache.org