News in 5.1.0, 2021-07-19
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GtkSourceView 5.1.0 is the first alpha release of GtkSourceView as we
progress towards the 5.2 release.

Changes since 5.0.0

 * Fix GtkSourceView 5.0 version check macros
 * Improve font and styling of GtkSourceMap
 * Improve input gestures to make GtkSourceMap more predictable and
   reduce scroll latency
 * Various GObject Introspection fixes
 * Avoid a number of string copies in CSS processing
 * Avoid alpha compositing when drawing the right-margin
 * Improve PCRE2 support to perform closer to GRegex
 * GtkSourceSearchContext is now powered by PCRE2 when regexes are in use
 * javascript.lang, typescript.lang, html.lang: alter character ranges to
   work with PCRE2 by using \N{U+} style escapes
 * groovy.lang: add mimetype for groovy
 * sh.lang: fix short parameter expansion
 * powershell.lang: add support for powershell 7
 * Kate: fix matched brackets color
 * Adwaita: fix selection styling to support libadwaita
 * Translation updates