plautopatch.sty: do not require pxeveryshi and pxatbegshi

anticipating native support by pLaTeX2e 2020-10-01,
these packages are made no-op. See texjporg/tests-shipout#1

plautopatch-ja.tex

@@ -158,6 +158,8 @@ \section*{変更履歴}
   \item 2020/02/25 v0.9e \textsf{textpos}のサポート
   \item 2020/05/05 v0.9f \textsf{collcell}のサポート
   \item 2020/05/25 v0.9g \textsf{pxjahyper}の自動読込
+  \item 2020/09/13 v0.9h \LaTeXe~2020-10-01では\textsf{filehook}非依存に
+  \item 2020/09/25 v0.9i \textsf{pxeveryshi}と\textsf{pxatbegshi}を不要に
 \end{itemize}
 
 \end{document}

plautopatch.sty

@@ -8,7 +8,7 @@
 
 \NeedsTeXFormat{LaTeX2e}% not pLaTeX2e on purpose!
 \ProvidesPackage{plautopatch}
-    [2020/09/13 v0.9h Automated patches for pLaTeX/upLaTeX]
+    [2020/09/25 v0.9i Automated patches for pLaTeX/upLaTeX]
 
 \ifx\pfmtname\@undefined
   \PackageWarningNoLine{plautopatch}{%
@@ -213,8 +213,16 @@
 % --- in most cases, pxeverysel can be safely loaded even after everysel
 % --- but it can fail when \AtBeginDocument{everysel} is involved
 \platpc@patch@before{everysel}{pxeverysel}% platex-tools
-\platpc@patch@after{everyshi}{pxeveryshi}% platex-tools
-\platpc@patch@after{atbegshi}{pxatbegshi}% platex-tools
+% --- since LaTeX2e 2020-10-01, everyshi.sty is merely
+% --- an emulation by everyshi-ltx.sty from ltshipout.dtx,
+% --- which is supported by pLaTeX2e kernel natively
+\@ifl@t@r{\fmtversion}{2020/10/01}{}%
+  {\platpc@patch@after{everyshi}{pxeveryshi}}% platex-tools
+% --- since LaTeX2e 2020-10-01, atbegshi.sty is merely
+% --- an emulation by atbegshi-ltx.sty from ltshipout.dtx,
+% --- which is supported by pLaTeX2e kernel natively
+\@ifl@t@r{\fmtversion}{2020/10/01}{}%
+  {\platpc@patch@after{atbegshi}{pxatbegshi}}% platex-tools
 \platpc@patch@before{ftnright}{pxftnright}% platex-tools
 \platpc@patch@after{multicol}{pxmulticol}% platex-tools
 \platpc@patch@after{xspace}{pxxspace}% platex-tools

plautopatch.tex

@@ -160,6 +160,8 @@ \section*{Change History}
   \item 2020/02/25 v0.9e Add support for \textsf{textpos}
   \item 2020/05/05 v0.9f Add support for \textsf{collcell}
   \item 2020/05/25 v0.9g Automatically load \textsf{pxjahyper}
+  \item 2020/09/13 v0.9h No dependency for \textsf{filehook} on \LaTeXe~2020-10-01
+  \item 2020/09/25 v0.9i Do not require \textsf{pxeveryshi} and \textsf{pxatbegshi}
 \end{itemize}
 
 \end{document}

pxpgfrcs.sty

@@ -9,7 +9,7 @@
 %% package declaration
 \NeedsTeXFormat{pLaTeX2e}
 \ProvidesPackage{pxpgfrcs}
-  [2018/09/21 v0.1]
+  [2018/09/21 v0.1 shadings etc in tate class]
 \RequirePackage{pgfrcs}
 
 % Note: I chose the name "pxpgfrcs.sty"