title: Vuejs 3 webpack : Problem with vue-template-compiler
body: <p>I am trying to integrate vuejs 3 to an existing project which uses webpack. I read about vue-loader, so I am trying to use it.</p>
  <p>In the official documentation I have this:</p>
  <p><em>Every time a new version of vue is released, a corresponding version of vue-template-compiler is released together. The compiler's version must be in sync with the base vue package so that vue-loader produces code that is compatible with the runtime. This means every time you upgrade vue in your project, you should upgrade vue-template-compiler to match it as well.</em></p>
  <p>So, when I try to compile I get this error:</p>
  <pre><code>Vue packages version mismatch:
  
  - vue@3.0.2 (/home/alejo/playground/parquesFrontend/node_modules/vue/index.js)
  - vue-template-compiler@2.6.12 (/home/alejo/playground/parquesFrontend/node_modules/vue-template-compiler/package.json)
  
  This may cause things to work incorrectly. Make sure to use the same version for both.
  If you are using vue-loader@&gt;=10.0, simply update vue-template-compiler.
  If you are using vue-loader@&lt;10.0 or vueify, re-installing vue-loader/vueify should bump vue-template-compiler to the latest.
  </code></pre>
  <p>But when I try to install vue-template-compiler@3.0.2 I get this error:</p>
  <pre><code>❯ npm install vue-template-compiler@3.0.2
  npm ERR! code ETARGET
  npm ERR! notarget No matching version found for vue-template-compiler@3.0.2.
  npm ERR! notarget In most cases you or one of your dependencies are requesting
  npm ERR! notarget a package version that doesn't exist.
  
  npm ERR! A complete log of this run can be found in:
  npm ERR!     /home/alejo/.npm/_logs/2020-11-17T02_52_46_458Z-debug.log
  </code></pre>
  <p>How can I solve this problem?</p>