Bump postcss from 7.0.23 to 7.0.36

Bumps [postcss](https://github.com/postcss/postcss) from 7.0.23 to 7.0.36.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/7.0.23...7.0.36)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

src/index.js

@@ -27,21 +27,16 @@ export default {
   },
   data () {
     return {
-      focused: false
+      focused: false,
+      body: ''
     }
   },
   computed: {
-    valueModel: {
-      get () { return this.value },
-      set (value) {
-        this.$emit('input', value)
-      }
-    },
     showPlaceholder () {
-      return !this.valueModel.replace(/^\s*\n/gm, '').length
+      return !this.body.replace(/^\s*\n/gm, '').length
     },
     computedBody () {
-      return highlight(this.valueModel, {
+      return highlight(this.body, {
         extractUrlsWithoutProtocol: this.extractUrlsWithoutProtocol
       })
     }
@@ -69,14 +64,15 @@ export default {
     },
     clear () {
       this.$refs.mbody.innerText = ''
-      this.valueModel = ''
+      this.body = ''
     },
     onKeyUp (e) {
       let caretPosition = this.getCaretPos()
       if (e.keyCode === 13) { // Enter key
         caretPosition++
       }
-      this.valueModel = e.target.innerText
+      this.body = e.target.innerText
+      this.$emit('input', this.body)
       this.$nextTick(() => {
         this.setCaretPos(caretPosition)
       })