Move 'keep' to 'take' (#5123)

crates/nu-command/tests/commands/mod.rs

@@ -27,7 +27,6 @@ mod histogram;
 mod insert;
 mod into_filesize;
 mod into_int;
-mod keep;
 mod last;
 mod length;
 mod lines;
@@ -60,6 +59,7 @@ mod split_by;
 mod split_column;
 mod split_row;
 mod str_;
+mod take;
 mod touch;
 mod uniq;
 mod update;