Prepare release 0.20.0 (exasol#316)

Prepare release 0.19.0 (exasol#304)

Prepare release 0.18.0 (exasol#287)

Prepare release 0.17.0 (exasol#282)

Prepare release 0.16.0 (exasol#276)

Fix CD workflow (exasol#252)

Prepare release 0.14.0 (exasol#212)

Prepare release 0.13.0 (exasol#201)

Prepare release 0.12.0 (exasol#183)

Prepare release 0.11.0 (exasol#182)