Log Message:
poppler*: Update to 0.71.0.

Release 0.71.0:
        core:
         * Replace the implementation of GooString by std::string but keep the \ 
exact interface intact.
         * Replace GBool, gTrue, and gFalse by bool, true, false, resp.
         * Splash: Fix crash if document is malformed (too wide)

        qt5:
         * Fix crash when adding Highlight Annotations
         * Default to hidden symbols
         * Fix two leaks in a test

        glib:
         * demo: Fix build on Windows
         * demo: Align property labels to top of cell

        cpp:
         * Fix typos in documentation

        build system:
         * Enable searching for GTK on Windows
         * Remove unused files
         * Add fuzzer target from oss-fuzz project

Release 0.70.1
        glib:
         * Install missing file

Release 0.70.0
        core:
         * FreeText annotations: default to font from default appearance string
         * Splash: Speed improvements
         * Fix security issues found by oss-fuzz
         * Improve page lable parsing
         * Use std some std classes instead of self grown ones
         * Various internal improvements

        qt5:
         * Add Page::index() method
         * Improve method to get the page from a label string

        glib:
         * Fix crash on missing embedded file
         * Add support for PDF subtype property
         * Only export symbols in the public API

        utils:
         * pdftohtml: Improve font handling

Release 0.69.0
        core:
         * Add annotation font color
         * Splash: Some speed improvements
         * PSOutputDev: add native support for type 7 shadings when using level 3
         * Add support for PDF subtype property
         * Link: Fix memory leak regarding next actions
         * Fix handling of Signature Info Location and Reason
         * Fix errors in computation of type3 glyphs transformation matrix
         * Reimplement Dict class in a more modern way
         * Fix security issues found by oss-fuzz
         * Fix memory issues in GfxImageColorMap copy ctor
         * Don't abort if the SampleFunction has too many samples. Issue #634
         * Document the OutputDev::clip and OutputDev::oeClip methods
         * fix macOS compilation due to boolean define in jpeglib
         * Split GDir and GDirEntry out of gfile.h. Issue #370

        qt5:
         * Add annotation font color

        cpp:

        utils:
         * pdfinfo: Show PDF subtype
         * pdftotext: Fix only outputs first page content with -bbox-layout \ 
option. Issue #88
         * pdftotext: Fix memory leak in printLine

        build system:
         * Require C++14