fix version date

stb_truetype.h

@@ -1,5 +1,5 @@
 // stb_truetype.h - v1.25 - public domain
-// authored from 2009-2020 by Sean Barrett / RAD Game Tools
+// authored from 2009-2021 by Sean Barrett / RAD Game Tools
 //
 // =======================================================================
 //
@@ -58,7 +58,7 @@
 //
 // VERSION HISTORY
 //
-//   1.25 (2020-07-11) many fixes
+//   1.25 (2021-07-11) many fixes
 //   1.24 (2020-02-05) fix warning
 //   1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS)
 //   1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined
@@ -4913,6 +4913,12 @@ STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const
 
 // FULL VERSION HISTORY
 //
+//   1.25 (2021-07-11) many fixes
+//   1.24 (2020-02-05) fix warning
+//   1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS)
+//   1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined
+//   1.21 (2019-02-25) fix warning
+//   1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics()
 //   1.19 (2018-02-11) OpenType GPOS kerning (horizontal only), STBTT_fmod
 //   1.18 (2018-01-29) add missing function
 //   1.17 (2017-07-23) make more arguments const; doc fix