Upload stupidfilter.json

https://stackoverflow.com/questions/29663187/csv-to-json-using-jq#54008382

```bash
mlr --c2j --jlistwrap cat train.csv
```

.gitattributes

@@ -57,3 +57,4 @@ stupidfilter.sql filter=lfs diff=lfs merge=lfs -text
 stupidfilter.sqlite filter=lfs diff=lfs merge=lfs -text
 stupidfilter.csv filter=lfs diff=lfs merge=lfs -text
 train.csv filter=lfs diff=lfs merge=lfs -text
+stupidfilter.json filter=lfs diff=lfs merge=lfs -text

stupidfilter.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1df015328818d7a69094ca9ad0a646007008f01d1153be8ba3c5eb8c0cad624d
+size 92373992