Squashed commit of the following:

    adapting to newer libfolia
    refactoring,  make more use of ticcutils goodies
    use more C++17 features

.github/workflows/foliautils.yml

@@ -7,7 +7,7 @@ on:
   push:
     branches:
       - master
-      - actions
+      - develop
 
     paths:
       - configure.ac
@@ -48,10 +48,12 @@ jobs:
 
       - uses: LanguageMachines/ticcactions/cpp-submodule-build@v1
         with:
+          branch: ${{ github.ref_name }}
           module: ticcutils
 
       - uses: LanguageMachines/ticcactions/cpp-submodule-build@v1
         with:
+          branch: ${{ github.ref_name }}
           module: libfolia
 
       - uses: LanguageMachines/ticcactions/cpp-submodule-build@v1
@@ -60,6 +62,7 @@ jobs:
 
       - uses: LanguageMachines/ticcactions/cpp-submodule-build@v1
         with:
+          branch: ${{ github.ref_name }}
           module: ucto
 
       - name: Static Code-check
@@ -76,3 +79,4 @@ jobs:
           step: build
           status: ${{ env.action_status }}
           details: ${{ env.action_details }}
+        continue-on-error: true

configure.ac

@@ -93,15 +93,15 @@ PKG_CHECK_MODULES([XML2], [libxml-2.0 >= 2.6.16] )
 CXXFLAGS="$CXXFLAGS $XML2_CFLAGS"
 LIBS="$XML2_LIBS $LIBS"
 
-PKG_CHECK_MODULES([ticcutils], [ticcutils >= 0.34] )
+PKG_CHECK_MODULES([ticcutils], [ticcutils >= 0.36] )
 CXXFLAGS="$ticcutils_CFLAGS $CXXFLAGS"
 LIBS="$ticcutils_LIBS $LIBS"
 
 PKG_CHECK_MODULES([ucto], [ucto >= 0.9.4] )
 CXXFLAGS="$ucto_CFLAGS $CXXFLAGS"
 LIBS="$ucto_LIBS $LIBS"
 
-PKG_CHECK_MODULES([folia], [folia >= 2.19] )
+PKG_CHECK_MODULES([folia], [folia >= 2.21] )
 CXXFLAGS="$folia_CFLAGS $CXXFLAGS"
 LIBS="$folia_LIBS $LIBS"