Fix some compilation warnings

datasheet.cls

@@ -40,17 +40,12 @@
 \RequirePackage{threeparttable}
 
 % Align figure and table captions to left.
-\RequirePackage[font=bf, skip=5pt, justification=raggedright, format=hang, singlelinecheck=off]{caption}
+\RequirePackage[font=bf,
-
+    skip=5pt,
-% Format hyperlinks as blue and set PDF title based on \title{} in the document.
+    justification=raggedright,
-\RequirePackage[pdfusetitle]{hyperref}
+    format=hang,
-\hypersetup{
+    singlelinecheck=off,
-    pdftex,
+    hypcap=false]{caption}
-    breaklinks=true,
-    colorlinks=true,
-    linkcolor=.,
-    urlcolor=blue
-}
 
 % Configure page margins
 \RequirePackage{geometry}
@@ -124,6 +119,17 @@
 % No numbering for section titles
 \setcounter{secnumdepth}{0}
 
+% Section and subsection spacing
 \usepackage{titlesec}
 \titlespacing*{\section}{0pt}{.2ex}{.2ex}
 \titlespacing*{\subsection}{0pt}{.2ex}{.2ex}
+
+% Format hyperlinks as blue and set PDF title based on \title{} in the document.
+% Hyperref must be loaded last (in particular after titlesec)
+\RequirePackage[pdfusetitle]{hyperref}
+\hypersetup{
+    breaklinks=true,
+    colorlinks=true,
+    linkcolor=.,
+    urlcolor=blue
+}

preamble.tex

@@ -16,6 +16,7 @@
 
 \usepackage{tikz}
 \usepackage{pgfplots}
+\pgfplotsset{compat=1.18}
 \usepackage{circuitikz}
 \usepackage{pifont}