feat:新增水滴

src/views/components/PenAnimates.vue

@@ -73,6 +73,7 @@
                 <t-option :key="1" :value="1" label="水珠" />
                 <t-option :key="2" :value="2" label="圆点" />
                 <t-option  v-if="['polyline','line'].includes(props.pen.lineName)" :key="3" :value="3" label="箭头" />
+                <t-option  v-if="['polyline','line'].includes(props.pen.lineName)" :key="4" :value="4" label="水滴" />
               </t-select>
             </div>