Added tag 0.12.3 for changeset cb0c30bdf81a

pkg: prepare 0.12.3

api: make sure all inputs related to insertion_dates are tzaware

We decide to go lenient there as some values
come from an Excel client and it can be annnoying
to deal with it upstream.

util: provide an `empty_series` helper

This will help make empty series with the right dtype,
name, and especially index type.

tsio/guard: add a safety belt for non-datetime indexes

test: exhibit unnice behaviour when a fancy index is provided

util: coerce float32 series into float64 series

test: show that we ingest float32 series without much thinking

util: provide a debugging help

Quick-setting server-side debugging sessions with this
will help a bit.

cli/doc: spell fix

api/db: allow the connection pool to grow quite large

This is not something we can easily control otherwise.

tests: silence a pandas warning

Added tag 0.12.2 for changeset f496cebf01e3

tsio/replace: return en empty series rather than None (to mirror .update)

pkg: prepare 0.12.2

tsio/get+revdate: return an empty series rather than None

api/replace: also allow replacing a locally existing series, even if also remotely available

api: allow local update if series exists locally and remotely

test/api: show that we cannot update a local series if it exists remotely

This is too restrictive. If it exists locally it should be
updatable.