v1.2.1

Bugfixes for new softclipping behavior and splice junction filtering.

• In v1.2.0 the filter --max_intron was incorrectly implemented in bookend condense, producing a crash
• Default behavior for bookend elr --data_type ONT now assumes start and end tags on all reads
• bookend elr now does not require softclipping to recognize a start tag passed in the read name or with the argument -s
• Swapped bookend elr --remove_noncanonical for --allow_noncanonical, making discarding noncanonical splice junctions default behavior