build: remove unused package

Author: nogic1008

lib/process.js

@@ -13,7 +13,6 @@ const getCustomTransformer = require('./utils').getCustomTransformer
 const loadSrc = require('./utils').loadSrc
 const babelTransformer = require('babel-jest')
 const compilerUtils = require('@vue/component-compiler-utils')
-const convertSourceMap = require('convert-source-map')
 const generateCode = require('./generate-code')
 
 function resolveTransformer(lang = 'js', vueJestConfig) {

package.json

@@ -70,7 +70,6 @@
     "@babel/plugin-transform-modules-commonjs": "^7.2.0",
     "@vue/component-compiler-utils": "^3.1.0",
     "chalk": "^2.1.0",
-    "convert-source-map": "^1.6.0",
     "extract-from-css": "^0.4.4",
     "source-map": "0.5.6",
     "ts-jest": "25.5.x"