Old Bidi_Class values for unassigned code points are wrong

[eggrobin]

Possibly for other properties too, compare https://github.com/unicode-org/unicodetools/blob/main/unicodetools/src/main/java/org/unicode/props/DefaultValues.java.

The JSPs with history for U+0590 show 3.1.1..3.2: Left_To_Right | 4.0..18.0β: Right_To_Left