fix: 修复toPrecision精度问题

package.json

@@ -17,6 +17,7 @@
     "@toast-ui/editor": "^2.1.2",
     "ant-design-vue": "^1.7.2",
     "axios": "^0.18.0",
+    "bignumber.js": "^9.1.2",
     "china-area-data": "^5.0.1",
     "clipboard": "^2.0.4",
     "codemirror": "^5.46.0",

src/utils/phdHelper.js

@@ -1,3 +1,5 @@
+import BigNumber from "bignumber.js"
+
 /**
  * PHD 类型
  */
@@ -91,7 +93,7 @@ export class PHDParser {
     this.qualify = headerInfoLine1[4]
 
     const liveTime = parseFloat(this.getBlockStr('Acquisition', 0, 3))
-    this.liveTime = parseFloat(liveTime.toPrecision(6))
+    this.liveTime = BigNumber(liveTime).toPrecision(6)
 
     // 如果解析的是sample 文件，则解析相关联的文件
     if (this.isSample) {