Log Message:
tesseract: updated to 5.4.0

5.4.0
Update appveyor.yml - Url has changed
Fix grey result of indexed PNG in pdfrenderer.
Fix some typos
normstrngs: add more hyphens and quotes
Rename frk -> deu_latf (ISO 639-3, ISO 15924)
Fix some performance issues which were reported by Coverity Scan
Remove broken Dockerfile
PAGE XML renderer / export
Remove unsupported OpenCL code and related API functions
facilitate vectorization for generic build
Support training without lstmf files
Simplify GridSearch<...> variables using typedef equivalents
Use std::min and std::max for min & max operations in \ 
makerow.cpp::most_overlapping_row()
Fix a few typos in comments
Remove an unused variable in paragraphs.cpp::DetectParagraphs()
A few refactors in some files
Fix output and issues reported by Coverity Scan for PAGE XML renderer
Update documentation
Fix some issues which were reported by GitHub code scanning
Improve CCUtil::main_setup
Allow for text angle/gradient to be retrieved
Fix setup of datadir on installations with Conda
Fix FP exception in Wordrec::angle_change
Use AM_CPPFLAGS also for compilation of all sources
Fix some compiler warnings
Remove unused xmlns:xlink from ALTO renderer
Fix some compiler warnings
Fixes: remove unnecessary nullptr checks
Avoid redundant conversion from std::string to char * to std::string
Replace strcpy and strncpy by new inline helper function
Make function Network::spec pure virtual