Fix 1733: Support scalatest NotWord

[regadas]

Fixes: #1733

[codecov]

Codecov Report

Merging #1743 into master will increase coverage by 0.57%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1743      +/-   ##
==========================================
+ Coverage   68.46%   69.04%   +0.57%     
==========================================
  Files         175      175              
  Lines        5603     5362     -241     
  Branches      313      397      +84     
==========================================
- Hits         3836     3702     -134     
+ Misses       1767     1660     -107

Impacted Files	Coverage Δ
...com/spotify/scio/testing/SCollectionMatchers.scala	96.7% <100%> (+0.03%)	⬆️
.../spotify/scio/bigquery/client/BigQueryConfig.scala	0% <0%> (-70.59%)	⬇️
...scala/com/spotify/scio/bigquery/client/Cache.scala	0% <0%> (-66.67%)	⬇️
.../spotify/scio/bigquery/BigQueryPartitionUtil.scala	0% <0%> (-58.98%)	⬇️
...scala/com/spotify/scio/bigquery/BigQueryUtil.scala	50% <0%> (-50%)	⬇️
...la/com/spotify/scio/bigquery/client/QueryOps.scala	0.82% <0%> (-47.11%)	⬇️
...com/spotify/scio/bigquery/types/BigQueryType.scala	37.5% <0%> (-25%)	⬇️
...la/com/spotify/scio/bigquery/client/TableOps.scala	0% <0%> (-22.37%)	⬇️
...la/com/spotify/scio/bigquery/client/BigQuery.scala	27.02% <0%> (-10.82%)	⬇️
...n/scala/com/spotify/scio/bigquery/BigQueryIO.scala	24.29% <0%> (-3.74%)	⬇️
... and 1 more

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