* feat: Add option to eigs() to turn off eigenvector computation
For large matrices, the eigenvector computation can be noticeably expensive
and so it's worthwhile to have a way to turn it off if the eigenvectors
will not be used.
Resolves#2180.
* fix: Add test for precision in options arg of eigs
And also a fix for a small bug that the new test uncovered.
* test: check eigs with matrix and options
* refactor: remove dead code from complexEigs.js
* fix: add new signatures of eigs to typescript
* test: ensure eigenvectors property not present with eigenvectors: false option
* fix: correct balancing code in complexEigs