Ohsome

* upgrade OSHDB to version [`0.7.2`](https://github.com/GIScience/oshdb/releases/tag/0.7.2), with bugfixes for not working `length:` and `area:` filters on ignite and improved job canceling ([#237])

[237]: https://github.com/GIScience/ohsome-api/pull/237

Bug Fixes

* fix wrong thrown exceptions in case of invalid `bpolys` boundary ([214])
* fix not thrown exception in case of `bpolys` and `bcircles` boundaries not lying completely within the underlying data-extract polygon ([201])

Performance Improvements

* avoid unnecessary geometry building for `count/ratio` requests ([161])

Other Changes

* upgrade to OSHDB version 0.7.1 – note that OSHDB database files from the previous version are not compatible with the OSHDB version 0.7 anymore, so you have to either [redownload](https://downloads.ohsome.org/OSHDB/v0.7/) or [recreate](https://github.com/GIScience/oshdb/blob/0.7/oshdb-etl/README.md) them from scratch ([#222], [225])
* adapt error message for contributions extraction endpoint in case of wrong `time` parameter value ([208])

[161]: https://github.com/GIScience/ohsome-api/pull/161
[201]: https://github.com/GIScience/ohsome-api/issues/201
[208]: https://github.com/GIScience/ohsome-api/issues/208
[214]: https://github.com/GIScience/ohsome-api/issues/214
[222]: https://github.com/GIScience/ohsome-api/pull/222
[225]: https://github.com/GIScience/ohsome-api/pull/225

New Features

* add new `contributionTypes` property to `properties` parameter ([136])
* add new `/contributions/latest/count` and `/contributions/latest/count/density` endpoints ([174])
* add new `contributionType` parameter for contributions aggregation ([174])
* contributions extraction endpoints now return the `contributionChangesetId` as a separate field ([200])

Bug Fixes

* fix uncaught GeoJSON parsing exception ([55])
* fix a bug where `getMetadataTest` unit test fails in certain setups ([175])
* remove the parameters `snapshotTimestamp` and `lastEdit` from full-history extraction responses ([191])

Other Changes

* add information regarding a potential "NaN" value for `ratio` results to docs ([166])
* properly skip `GetControllerTest` class if `port1` parameter is absent ([164])
* update ohsome parent module, requires maven version 3.6 or higher ([184])
* update documentation([88]) ([150]) and endpoints graph ([158])
* remove deprecated request parameters from swagger definition and UI ([168])

[55]: https://github.com/GIScience/ohsome-api/issues/55
[88]: https://github.com/GIScience/ohsome-api/issues/88
[136]: https://github.com/GIScience/ohsome-api/issues/136
[150]: https://github.com/GIScience/ohsome-api/issues/150
[158]: https://github.com/GIScience/ohsome-api/issues/158
[164]: https://github.com/GIScience/ohsome-api/pull/164
[166]: https://github.com/GIScience/ohsome-api/issues/166
[168]: https://github.com/GIScience/ohsome-api/pull/168
[174]: https://github.com/GIScience/ohsome-api/issues/174
[175]: https://github.com/GIScience/ohsome-api/issues/175
[184]: https://github.com/GIScience/ohsome-api/pull/184
[191]: https://github.com/GIScience/ohsome-api/issues/191

* contributions extraction endpoints now return the `contributionChangesetId` as a separate field (backported from 1.5.0) ([200])

[200]: https://github.com/GIScience/ohsome-api/issues/200

* upgrade OSHDB to version [OSHDB0.6.4], fixes the following two bugs:
* fix crash when a non-existent tag is used in a filter ([154])
* fix crash in `groupBy/boundary` queries caused by invalid OSM geometries ([OSHDB362])

New Features

* add new endpoint /contributions/count/{density} ([115])

Bug Fixes

* fix some invalid filters in the default swagger examples ([111])
* fix returning invalid GeoJSON using empty coordinates for deletion contributions ([129], [131])
* fix using a proper boolean data type instead of a string for contributionType in response ([135])
* fix a null pointer exception in data extraction requests ([141], [145])
* make sure geometry filters are applied to all returned features of elementsFullHistory requests ([109])

Performance and Code Quality

* improve performance of ratio requests ([114])

Other Changes

* update all tests using the filter parameter instead of deprecated types, keys, values ([98])
* update some default parameter values in swagger UI to slightly more sensible examples ([113])
* restructure packages and classes within the controller and output packages ([117])
* extend docs on contribution types ([134])
* round coordinates of returned OSM features to 7 decimal places ([138])
* improve code style by wrapping all code lines longer than 100 characters ([83])
* update ohsome parent to version 2.8 ([152])

[83]: https://github.com/GIScience/ohsome-api/issues/83
[98]: https://github.com/GIScience/ohsome-api/issues/98
[109]: https://github.com/GIScience/ohsome-api/issues/109
[111]: https://github.com/GIScience/ohsome-api/issues/111
[113]: https://github.com/GIScience/ohsome-api/issues/113
[114]: https://github.com/GIScience/ohsome-api/pull/114
[115]: https://github.com/GIScience/ohsome-api/issues/115
[117]: https://github.com/GIScience/ohsome-api/issues/117
[129]: https://github.com/GIScience/ohsome-api/issues/129
[131]: https://github.com/GIScience/ohsome-api/issues/131
[134]: https://github.com/GIScience/ohsome-api/issues/134
[135]: https://github.com/GIScience/ohsome-api/pull/135
[138]: https://github.com/GIScience/ohsome-api/issues/138
[141]: https://github.com/GIScience/ohsome-api/issues/141
[145]: https://github.com/GIScience/ohsome-api/pull/145
[152]: https://github.com/GIScience/ohsome-api/pull/152