<svg.*on.*?>|<img.*on.*?> はマッチする範囲が広すぎるため onload|onerror にサニタイズ対象を限定する

[nanasess]

• <img src="Pater-Lieven-Blond.jpg"> などにもマッチしてしまうため、 onload, onerror に対してサニタイズするよう修正
• Smarty の script_escape でサニタイズされる対象の追加 #458

[codecov-commenter]

Codecov Report

Merging #461 (cefd605) into master (e7c989b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #461   +/-   ##
=======================================
  Coverage   53.89%   53.89%           
=======================================
  Files          76       76           
  Lines        8992     8992           
=======================================
  Hits         4846     4846           
  Misses       4146     4146           

Flag	Coverage Δ
tests	53.89% <ø> (ø)

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[okazy]

ありがとうございます！マージしました。