Support Vue 3

[Isokaeder]

Preparation in Vue 2:

• update to Vue Naruto (Vue 2.7+)
  • update to latest @vue/composition-api
• Investigate 3rd party library support
• remove legacy slots (see eslint rules below)
• replace ::v-deep with :deep()
• replace v-model value @input with modelValue @update:modelValue
• explicitly declare emits for all components (vue/require-explicit-emits)

Necessary Steps for Vue 3

• element-plus instead of element-ui
• build system adjustments

Here be dragons

• KtTable
• KtFieldDate*

---

• vite
• vue-demi

Helpful eslint rules

"vue/no-deprecated-slot-scope-attribute": "error",
"vue/no-deprecated-slot-attribute": "error",
"vue/no-deprecated-dollar-scopedslots-api": "error",
"vue/require-explicit-emits": "error",
"vue/v-slot-style": "error",