Updates to make the plugin work with 0.16.0

...and to be clear, by "work" I don't mean things won't be broken.
The whole rotated title "spines" thing needs to be completely re-thought
(just as an example)

manifest.json

@@ -6,5 +6,5 @@
   "description": "Sliding Panes! Based on the style of [Andy Matuschak's Notes](https://notes.andymatuschak.org/)",
   "isDesktopOnly": false,
   "version": "3.3.0",
-  "minAppVersion": "0.15.3"
+  "minAppVersion": "0.16.0"
 }

src/styles.scss

@@ -2,15 +2,15 @@ body.plugin-sliding-panes .workspace>.mod-root {
     overflow-x: auto;
     overflow-y: hidden;
 
-    &>.workspace-leaf {
+    &>.workspace-tabs {
         display: block;
         flex: none;
-        
-        .workspace-leaf-content {
+
+        .workspace-leaf {
             position: relative;
         }
     }
-    
+
     &>.workspace-split {
         flex: none;
     }
@@ -24,7 +24,7 @@ body.plugin-sliding-panes .workspace>.mod-root {
     }
 
 }
-body.plugin-sliding-panes-stacking .workspace>.mod-root>.workspace-leaf,
+body.plugin-sliding-panes-stacking .workspace>.mod-root>.workspace-tabs,
 body.plugin-sliding-panes-stacking .workspace>.mod-root>.workspace-split {
     box-shadow: 0px 0px 20px 20px rgba(0, 0, 0, 0.25);
     position: sticky;

versions.json

@@ -1,4 +1,5 @@
 {
+  "3.4.0": "0.16.0",
   "3.3.0": "0.15.3",
   "3.2.5": "0.9.7"
 }