Correct matrix.d.ts file.

[lightrabbit]

Add method declaration rows, columns, addRow and addColumn to typings.
Correct pseudoInverse parameter type, threshold is a optional parameter.
Correct Matrix extends. In Javascript code, Matrix inherits from Array.

[codecov]

Codecov Report

Merging #86 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #86   +/-   ##
=======================================
  Coverage   61.94%   61.94%           
=======================================
  Files          25       25           
  Lines        2252     2252           
  Branches      280      280           
=======================================
  Hits         1395     1395           
  Misses        779      779           
  Partials       78       78

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[poteat]

This would be good too merge in. I had to write an explicit parameter today for psuedoInverse even though it's optional.

@lightrabbit Nice work. Out of curiosity why the change

fill(value: number): Matrix;

to

fill(value: number): this;

?

[lightrabbit]

@poteat This chagne use a TypeScript feature named polymorphic this types.
Because in Matrix's source code, Matrix#fill returns this. And this makes the class Matrix easier to extend.

[targos]

Thank you!