Version 0.12.4

Tagging v0.12

Bug fixes

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- Fix potential protection issues (#161).
- Zero-length strings are not treated as multibyte character strings anymore.
- Registering native methods to fix `R CMD check` warnings.
- Updating the filehash package no longer causes the tikzDevice package to fail (#168).
- Remove probably harmless extra space from text being measured.
- Don't overwrite string's encoding in `anyMultibyteUTF8Characters()` (#158, @jszhao).
- Enforce the encoding of temporary TeX file to UTF-8 (#159, @jszhao).
- Don't call `library(grid)` from package code anymore.
- Code from manual now contains simple apostrophes to allow copy-paste (#139).

Features
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- The new `tikzTest()` function (via `getLatexStrWidth(diagnose = TRUE)`) now writes a complete LaTeX document, which allows e.g. MikTeX to install missing LaTeX packages (#142, #149).
- If measurement fails, the `.tex` and `.log` files are not printed anymore,
  instead the location of these files is shown.
- Support LuaLaTeX > 0.85 by loading the luatex85 package if it exists and avoiding loading xunicode (#150).
- Temporary .tex and .log files are created in a separate directory for each run.

Internal
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- Consistent code style with the help of the styler package.
- `load_all()` works now.

- Fix environment variable detection when not set (#170, @tkonolige).

- `tikzTest()` now uses correct path to engine when reporting compiler info.
- `tikzTest()` now shows complete output of LaTeX run.
- Revert to writing incomplete document again, regression in 0.10-2.

- Fix `R CMD check`.

- Registering native methods to fix `R CMD check` warnings.

- Updating the filehash package no longer causes the tikzDevice package to fail (#168).

- Fix syntax of generated LaTeX for bold/italic characters, regressio…

…n in 0.10-2.