Add `subtotals_spec` and support variables on aggregations

Merge pull request #138 from simplecastapps/master

Add `subtotals_spec` and support variables on aggregations

Accept both 1.x and 2.x for httpoison

0.16.3

Merge pull request #131 from GameAnalytics/dependabot/hex/httpoison-2…

Combine "and" filters in more cases

Add "generated: true" in atom_or_string_value (#120)

Avoid Dialyzer warnings for unreachable case clauses.

0.16.1: Combine "and" filters in more cases (#119)

If part of the filter uses string keys (e.g. if it was parsed from
JSON), make sure we're still combining adjacent "and" filters for
tidier queries.

Need at least Elixir 1.11.3 for Macro.unique_var/2 - update mix.exs
and Travis configuration.

0.16.0: Support "expression" post-aggregator (#117)

See https://druid.apache.org/docs/latest/querying/post-aggregations.html#expression-post-aggregator

0.15.1: Use "generated: true" when incorporating filters (#116)

This avoids a Dialyzer error when Dialyzer knows the type of the
filter, and thus knows that two of the case clauses are unused.

0.15.0: Support "join" datasource (#82)

While it was already possible to pass a raw JSON object and make a
join query, with this change we can more easily use a nested query as
one side of the join, or do a nested join.

Support nested queries

Bump httpoison from 1.7.0 to 1.8.0 (#79)

Bumps [httpoison](https://github.com/edgurgel/httpoison) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/edgurgel/httpoison/releases)
- [Commits](https://github.com/edgurgel/httpoison/compare/v1.7.0...v1.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

make HLL Sketches work in post-aggregations

• Fix greatest / least post-aggregators
• Update dependencies

Allow passing CA certificate as string instead of file

Allow passing CA certificate as string (#65)

Accept `cacert` as well as `cacertfile`.