Fix time series scale to have each data point is spread equidistant

src/scales/scale.time.js

@@ -445,7 +445,7 @@ export default class TimeScale extends Scale {
 	 * `minor` unit using the given scale time `options`.
 	 * Important: this method can return ticks outside the min and max range, it's the
 	 * responsibility of the calling code to clamp values if needed.
-	 * @private
+	 * @protected
 	 */
   _generate() {
     const adapter = this._adapter;
@@ -485,7 +485,7 @@ export default class TimeScale extends Scale {
     }
 
     // @ts-ignore
-    return Object.keys(ticks).sort((a, b) => a - b).map(x => +x);
+    return Object.keys(ticks).sort(sorter).map(x => +x);
   }
 
   /**

src/scales/scale.timeseries.js

@@ -110,6 +110,25 @@ class TimeSeriesScale extends TimeScale {
     return table;
   }
 
+  /**
+    * Generates all timestamps defined in the data.
+    * Important: this method can return ticks outside the min and max range, it's the
+    * responsibility of the calling code to clamp values if needed.
+    * @protected
+    */
+  _generate() {
+    const min = this.min;
+    const max = this.max;
+    let timestamps = super.getDataTimestamps();
+    if (!timestamps.includes(min) || !timestamps.length) {
+      timestamps.splice(0, 0, min);
+    }
+    if (!timestamps.includes(max) || timestamps.length === 1) {
+      timestamps.push(max);
+    }
+    return timestamps.sort((a, b) => a - b).map(x => +x);
+  }
+
   /**
 	 * Returns all timestamps
 	 * @return {number[]}