[sdw] new commits pushed by lvdbrink

The following commits were just pushed by lvdbrink to https://github.com/w3c/sdw:

* typo (case) in abstract
  by Simon Cox
https://github.com/w3c/sdw/commit/58d604e4f6056d9779a98c000ff46b323e5388b0

* Merge pull request #1186 from w3c/time-agg-typo

typo (case) in abstract
  by Linda van den Brink
https://github.com/w3c/sdw/commit/8daa950dc9902c77b38a9b755b0ad301fb68e1cb