https://tex.stackexchange.com/q/438933/35864 - code for biblatex 3.6

lajosh-old.tex

\documentclass[paper=a4,12pt,numbers=endperiod]{scrartcl}

\usepackage[backend=biber,style=authoryear]{biblatex}
\DefineBibliographyStrings{english}{references={Bibliography}}

\DeclareFieldFormat{editortype}{\mkbibparens{#1}}
\renewbibmacro*{byeditor+others}{%
    \ifnameundef{editor}
    {}
    {\printnames[byeditor]{editor}%
        \setunit{\addspace}%
        \usebibmacro{byeditor+othersstrg}%
        \clearname{editor}%
        \newunit}%
    \usebibmacro{byeditorx}%
    \usebibmacro{bytranslator+others}}
\renewbibmacro*{byeditor+othersstrg}{\usebibmacro{editor+othersstrg}}
\renewbibmacro*{bytranslator+othersstrg}{\usebibmacro{translator+othersstrg}}
\renewbibmacro*{bytypestrg}[2]{%
    \iffieldundef{#1type}
    {\bibstring{#2}}
    {\ifbibxstring{\thefield{#1type}}
        {\bibstring{\thefield{#1type}}}
        {\printtext{\thefield{#1type}}}}}

\renewcommand*{\multinamedelim}{/}
\renewcommand*{\finalnamedelim}{\multinamedelim}

\renewcommand*{\labelnamepunct}{\addcolon\space}
\renewcommand*{\postnotedelim}{\addcolon\space}
\DeclareFieldFormat{postnote}{#1}
\DeclareFieldFormat{multipostnote}{#1}

\DeclareFieldFormat{superedition}{\textsuperscript{#1}}

\providecommand*{\iflabeldateisdate}{%
    \ifboolexpr{%
        not test {\iffieldundef{labeldatesource}}
        and 
        (test {\iffieldequalstr{labeldatesource}{}} 
        or test {\iffieldequalstr{labeldatesource}{year}})}}

\renewbibmacro*{date+extrayear}{%
    \iffieldundef{labelyear}
    {}
    {\usebibmacro{origdate}%
        \setunit*{\addspace}%
        \printtext[parens]{%
            \iflabeldateisdate
            {\iffieldnum{edition}
                {\printfield[superedition]{edition}%
                    \global\clearfield{edition}}
                {}%
                \printdateextra}
            {\printlabeldateextra}}}}

\newbibmacro*{origdate}{%
    \iffieldundef{origyear}
    {}
    {\printtext[brackets]{\printorigdate}}}

\renewcommand*{\bibpagespunct}{\addcolon\space}
\DeclareFieldFormat{pages}{#1}

\DeclareNameAlias{sortname}{family-given}


\DeclareFieldFormat[article,periodical]{number}{\mkbibparens{#1}}
\renewbibmacro*{volume+number+eid}{%
  \printfield{volume}%
  %\setunit*{\adddot}%<- comment this
  \printfield{number}%
  \setunit{\addcomma\space}%
  \printfield{eid}}

\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@collection{knobel2007a,
  title     = {A New Literacies Sampler},
  editor    = {Knobel, Michele and Lankshear, Colin},
  keywords  = {sek},
  location  = {New York},
  publisher = {Peter Lang},
  year      = {2007},
  series    = {New Literacies and Digital Epistemologies},
  number    = {29},
}
@article{berg2012a,
  title    = {Identifying Graphematic Units. Vowel and Consonant Letters},
  author   = {Berg, Kristian},
  journal  = {Written Language \& Literacy},
  keywords = {sek},
  number   = {1},
  pages    = {26--45},
  volume   = {15},
  year     = {2012}
}
\end{filecontents}
\addbibresource{\jobname.bib}

\begin{document}
Example sentence \textcite[cf.][3--6]{knobel2007a}.
Another example sentence \parencite[][39]{berg2012a}.

\printbibliography
\end{document}