feat(Progress): add stroke-width prop (#4397)

src/progress/demo/index.vue

@@ -4,24 +4,17 @@
       <van-progress :percentage="50" />
     </demo-block>
 
+    <demo-block v-if="!$attrs.weapp" :title="$t('strokeWidth')">
+      <van-progress :percentage="50" stroke-width="8" />
+    </demo-block>
+
     <demo-block :title="$t('title2')">
-      <van-progress
-        inactive
-        :percentage="50"
-      />
+      <van-progress inactive :percentage="50" />
     </demo-block>
 
     <demo-block :title="$t('title3')">
-      <van-progress
-        color="#f2826a"
-        :percentage="25"
-        :pivot-text="$t('orange')"
-      />
-      <van-progress
-        color="#ee0a24"
-        :percentage="50"
-        :pivot-text="$t('red')"
-      />
+      <van-progress color="#f2826a" :percentage="25" :pivot-text="$t('orange')" />
+      <van-progress color="#ee0a24" :percentage="50" :pivot-text="$t('red')" />
       <van-progress
         :percentage="75"
         :pivot-text="$t('purple')"
@@ -37,11 +30,13 @@ export default {
   i18n: {
     'zh-CN': {
       title2: '置灰',
-      title3: '样式定制'
+      title3: '样式定制',
+      strokeWidth: '线条粗细'
     },
     'en-US': {
       title2: 'Inactive',
-      title3: 'Custom Style'
+      title3: 'Custom Style',
+      strokeWidth: 'Stroke Width'
     }
   }
 };