Merge branch 'release/0.0.81' into develop
src: add instance method 'inverse()' for FullPivLU and CFullPivLU
test: add instance method 'inverse()' testings
readme: add instance method 'inverse()' api
lint: add some files for linting pass
npm: 0.0.81 -> 0.0.82
Merge branch 'release/0.0.82'