break in nodejs v14

[Bob Du]

2ca0498#diff-7ae45ad102eab3b6d7e7896acd08c427a9b25b346470d7bc6507b6481575d519L80

etcd3 v1.1.2 not support nodejs v14
because cockatiel need nodejs >= 16
https://github.com/connor4312/cockatiel/blob/master/changelog.md#300-beta0

There is no problem raising the minimum supported nodejs version, but it shouldn't happen in patch release bug fixes version.
This is a break compatibility change, we need a new major release.

[Bob Du]

ping @connor4312

[Icebob]

Same issue. The etcd3 patch version upgrade (1.1.0 -> 1.1.2) breaks my library. Changing the minimum Node version from v10 to v16 is a very big breaking change and needs a new major version.

[shizhx]

Same issue