Typography:

- use semibold for `h1`, `h2` and `h3`
- added `h1.regular`, `h2.regular` and `h3.regular`

flatlaf-core/src/main/resources/com/formdev/flatlaf/FlatLaf.properties

@@ -31,11 +31,15 @@
 # headings
 h00.font = +24
 h0.font = +18
-h1.font = +12
-h2.font = +6
-h3.font = +3
+h1.font = +12 $semibold.font
+h2.font = +6 $semibold.font
+h3.font = +3 $semibold.font
 h4.font = bold
 
+h1.regular.font = +12
+h2.regular.font = +6
+h3.regular.font = +3
+
 # text
 large.font = +2
 medium.font = -1
@@ -72,6 +76,9 @@ monospaced.font = Monospaced
 [style].h2 = font: $h2.font
 [style].h3 = font: $h3.font
 [style].h4 = font: $h4.font
+[style].h1.regular = font: $h1.regular.font
+[style].h2.regular = font: $h2.regular.font
+[style].h3.regular = font: $h3.regular.font
 [style].large = font: $large.font
 [style].medium = font: $medium.font
 [style].small = font: $small.font