v0.34.2

• blaze: check existence earlier during Assign
• coal: added note about using "$unset" with "Apply"
• coal: support translation when using "Apply"
• fire: support absent filtering for strings
• fire: support absent relationship filters
• flame: added callback
• torch: only attempt computations once by default
• torch: remove tag only if run in transaction
• torch: fix recomputation of zero value
• updated lungo