sigil: switch to Python 3.9. (#8096)

Seems to work fine, but crashes on close.

app-text/sigil/sigil-0.9.14.2.recipe

@@ -11,7 +11,7 @@ SOURCE_DIR="Sigil_WebKit-$portVersion"
 
 ADDITIONAL_FILES="sigil.rdef.in"
 
-PYTHON_VERSION="3.7"
+PYTHON_VERSION="3.9"
 
 ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
@@ -22,11 +22,11 @@ PROVIDES="
 	"
 REQUIRES="
 	haiku$secondaryArchSuffix
-	chardet_python3
-	cssselect_python3
-	html5lib_python3
-	lxml_python3
-	six_python3
+	chardet_python39
+	cssselect_python39
+	html5lib_python39
+	lxml_python39
+	six_python39
 	cmd:python$PYTHON_VERSION
 	lib:libhunspell_1.7$secondaryArchSuffix
 	lib:libminizip$secondaryArchSuffix
@@ -39,11 +39,11 @@ REQUIRES="
 
 BUILD_REQUIRES="
 	haiku${secondaryArchSuffix}_devel
-	chardet_python3
-	cssselect_python3
-	html5lib_python3
-	lxml_python3
-	six_python3
+	chardet_python39
+	cssselect_python39
+	html5lib_python39
+	lxml_python39
+	six_python39
 	devel:libgl$secondaryArchSuffix
 	devel:libhunspell_1.7$secondaryArchSuffix
 	devel:libminizip$secondaryArchSuffix
@@ -67,8 +67,8 @@ BUILD()
 	cd build
 
 	pythonBin=/bin/python${PYTHON_VERSION}
-	pythonLib=/system/$relativeDevelopLibDir/libpython${PYTHON_VERSION}m.so
-	pythonInclude=/system/develop/headers/python${PYTHON_VERSION}m
+	pythonLib=/system/$relativeDevelopLibDir/libpython${PYTHON_VERSION}.so
+	pythonInclude=/system/develop/headers/python${PYTHON_VERSION}
 
 	cmake .. \
 		-DCMAKE_BUILD_TYPE=Release \