0.1.4 release

update readme.md (#6)

- update readme.md
- update keywords.txt

0.1.3 release

add lastRead() (#5)

- optimized noInterrupts
- add lastRead()
- update readme.md
- update GitHub actions
- update license 2023
- minor edits

0.1.2 release

redo clock pulse (#4)

* redo clock pulse to match shiftIn / shiftOut
* update readme

0.1.1 release

optimize AVR (#3)

* optimize AVR
* minor edits

0.1.0 release

initial version (#2)

* initial version
* update readme
* fix build-CI