accept upper bound

(otherwise it's impossible to select all)

Author: Fil

src/marks/brush.js

@@ -51,12 +51,12 @@ export class Brush extends Mark {
           if (x) {
             const e = y ? [selection[0][0], selection[1][0]] : selection;
             const [x0, x1] = extent(e.map(x.invert));
-            index = index.filter(i => X[i] >= x0 && X[i] < x1);
+            index = index.filter(i => X[i] >= x0 && X[i] <= x1);
           }
           if (y) {
             const e = x ? [selection[0][1], selection[1][1]] : selection;
             const [y0, y1] = extent(e.map(y.invert));
-            index = index.filter(i => Y[i] >= y0 && Y[i] < y1);
+            index = index.filter(i => Y[i] >= y0 && Y[i] <= y1);
           }
         }
         const dots = selection ? Array.from(index, i => J[i]) : data;