Provide textRenderingMode, horizontalScaling, textRise, charcterSpacing and wordSpacing as an option for drawing text.
In operator.ts and PDFOperatorNames.ts those operators were already implementes. The function for the horizontalScaling (as it is called in the pdf standard) was called "setCharacterSqueeze" so far. To keep the standardized terminology, the function was renamed to "setHorizontalSpacing". However, for backward compatibility (if somebody had used setCharacterSqueeze in his own script; in the actual pdf-lib code there was no reference) the original function was kept as well with a deprecated note.
In the textOptions, not the standard names were used, but noun forms of it, to match the current options style (e.g. horizontalScale (options) instead of horizontalScaling (pdf standard)).

This reverts commit 39386a8.

revert temporary test removal

the first commit in master had to be reverted, since the tests were still in a temporary modified state. A new branch (textOptions) was then created on the basis of the meanwhile reverted commit. In this branch, the tests were cleaned up and the branch finally got merged with tha master. However, the actual changes, which were reverted in the master, were not merged, despiute the fact they were present in the brach. Finally, I manually added the actual changes directly in the master.

harmonization of tests + linting