compose/shift.json: uppercase for superscript letters & characters wi…

…thout preapplied uppercase versions

srcs/compose/shift.json

@@ -18,7 +18,38 @@
   "┐": "╗",
   "─": "═",
   "│": "║",
+  // superscript
+  "ᵃ": "ᴬ",
+  "ᵇ": "ᴮ",
+  "ᶜ": "ꟲ",
+  "ᵈ": "ᴰ",
+  "ᵉ": "ᴱ",
+  "ᶠ": "ꟳ",
+  "ᵍ": "ᴳ",
+  "ʰ": "ᴴ",
+  "ⁱ": "ᴵ",
+  "ʲ": "ᴶ",
+  "ᵏ": "ᴷ",
+  "ˡ": "ᴸ",
+  "ᵐ": "ᴹ",
+  "ⁿ": "ᴺ",
+  "ᵒ": "ᴼ",
+  "ᵖ": "ᴾ",
+  "ʳ": "ᴿ",
+  "ᵗ": "ᵀ",
+  "ᵘ": "ᵁ",
+  "ᵛ": "ⱽ",
+  "ʷ": "ᵂ",
+  "ᶾ": "ᴣ",
+  "ᵠ": "ᶲ",
+  // german eszett has an uppercase, but because it is uncommon, java doesn't know about it
   "ß": "ẞ",
+  // these characters don't have a preapplied uppercase version, so we use combining characters
+  "ẗ": "T\u0308",
+  "ẘ": "W\u030A",
+  "ẙ": "Y\u030A",
+  "ǰ": "J\u030C",
+  "ȷ": "J\u0307",
   // In Turkish, upper case of 'iı' is 'İI' but Java's toUpperCase will
   // return 'II'. To make 'İ' accessible, make it the shift of 'ı'. This
   // has the inconvenient of swapping i and ı on the keyboard.