Log Message:
SDL2_ttf: update to 2.0.18.

2.0.18:
Ozkan Sezer - Wed Jan  5 14:15:46 PST 2022
 * Added TTF_GetFreeTypeVersion() and TTF_GetHarfBuzzVersion()
Sylvain - Jan 16, 2021
 * Added support for Signed Distance Field rendering with TTF_SetFontSDF() and \ 
TTF_GetFontSDF()
David Ludwig - Dec 28, 2019
 * Added optional DPI-scaling of fonts, with the following new functions:
    TTF_OpenFontDPI()
    TTF_OpenFontIndexDPI()
    TTF_OpenFontDPIRW()
    TTF_OpenFontIndexDPIRW()
    TTF_SetFontSizeDPI()
Weard Anaether - Dec 2, 2019
 * Added 32-bit character support with:
    TTF_RenderGlyph32_Solid()
    TTF_RenderGlyph32_Shaded()
    TTF_RenderGlyph32_Blended()
    TTF_GetFontKerningSizeGlyphs32()
Arthur Danskin - Sep 3, 2019
 * Added 32-bit character support with TTF_GlyphIsProvided32() and \ 
TTF_GlyphMetrics32()
Sylvain - Apr 5, 2019
 * Added functions to set direction and script when using Harfbuzz:
    TTF_SetDirection()
    TTF_SetScript()
Sylvain - Mar 25, 2019
 * Added extended API for text measurement:
    TTF_MeasureText()
    TTF_MeasureUTF8()
    TTF_MeasureUNICODE()
Sylvain - Jan 31, 2019
 * Added TTF_SetFontSize() to set font size dynamically
 * Added 'Shaded' and 'Solid' text wrapped functions:
    TTF_RenderText_Solid_Wrapped()
    TTF_RenderUTF8_Solid_Wrapped()
    TTF_RenderUNICODE_Solid_Wrapped()
    TTF_RenderText_Shaded_Wrapped()
    TTF_RenderUTF8_Shaded_Wrapped()
    TTF_RenderUNICODE_Shaded_Wrapped()
 * Added TTF_HINTING_LIGHT_SUBPIXEL for better results at small text sizes at a \ 
performance cost