fix: update dependencies

docs: correct heading level

feat: add transaction retrying (fixes gajus#144)

fix: update dependencies

feat: add default idle_in_transaction_session_timeout and statement_t…

…imeout

BREAKING CHANGE: Adds idle_in_transaction_session_timeout and statement_timeout default values.

fix: update dependencies

fix: update dependencies (fixes gajus#129)

docs: update comparison to pg-promies (gajus#122)

docs: add TODO

feat: implemenet connection pooling

pg-pool have removed `min` option (brianc/node-pg-pool#135). Our implementation partially implements the original pro-active pooling logic. However, unlike the original implementation, we only pool new queries when another query is complete. The benefit of this approach is that if the process is otherwise idle, there are no unnecessary sockets being kept. Equally, the moment a single query is issued, we ensure that we bring the pool size to the minimum number of connections expected.