Bump vue from 2.6.14 to 3.0.0 in /frontend#62

Bumps [vue](https://github.com/vuejs/core) from 2.6.14 to 3.0.0. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/vuejs/core/blob/v3.0.0/CHANGELOG.md">vue's changelog</a>.</em></p> <blockquote> <h1><a href="https://github.com/vuejs/vue-next/compare/v3.0.0-rc.13...v3.0.0">3.0.0</a> (2020-09-18)</h1> <h1><a href="https://github.com/vuejs/vue-next/compare/v3.0.0-rc.12...v3.0.0-rc.13">3.0.0-rc.13</a> (2020-09-18)</h1> <h3>Bug Fixes</h3> <ul> <li><strong>hmr:</strong> make hmr working with class components (<a href="https://redirect.github.com/vuejs/vue-next/issues/2144">#2144</a>) (<a href="https://github.com/vuejs/vue-next/commit/422f05e085036e23ea3632c2ce75d86181a087b8">422f05e</a>)</li> <li><strong>reactivity:</strong> avoid length mutating array methods causing infinite updates (<a href="https://redirect.github.com/vuejs/vue-next/issues/2138">#2138</a>) (<a href="https://github.com/vuejs/vue-next/commit/f316a332b055d3f448dc735365551d89041f1098">f316a33</a>), closes <a href="https://redirect.github.com/vuejs/vue-next/issues/2137">#2137</a></li> <li><strong>suspense:</strong> should discard unmount effects of invalidated pending branch (<a href="https://github.com/vuejs/vue-next/commit/5bfcad155b444b2f7ffaac171c1f61bc23909287">5bfcad1</a>)</li> <li><strong>types:</strong> component instance inference without props (<a href="https://redirect.github.com/vuejs/vue-next/issues/2145">#2145</a>) (<a href="https://github.com/vuejs/vue-next/commit/57bdaa2220afefbde21118659c1ce2377d6b86d6">57bdaa2</a>)</li> </ul> <h3>Code Refactoring</h3> <ul> <li>watch APIs default to trigger pre-flush (<a href="https://github.com/vuejs/vue-next/commit/49bb44756fda0a7019c69f2fa6b880d9e41125aa">49bb447</a>), closes <a href="https://redirect.github.com//redirect.github.com/vuejs/vue-next/issues/1706/issues/issuecomment-666258948">vuejs/vue-next#1706</a></li> </ul> <h3>Features</h3> <ul> <li><strong>runtime-core:</strong> support using inject() inside props default functions (<a href="https://github.com/vuejs/vue-next/commit/58c31e36992d2647e5247de4904246fb2d6112ed">58c31e3</a>)</li> <li><strong>watch:</strong> support dot-delimited path in watch option (<a href="https://github.com/vuejs/vue-next/commit/1c9a0b3e195d144ac90d22d2cc2cef6a3fd8276d">1c9a0b3</a>)</li> </ul> <h3>BREAKING CHANGES</h3> <ul> <li>watch APIs now default to use <code>flush: 'pre'</code> instead of <code>flush: 'post'</code>. This change affects <code>watch</code>, <code>watchEffect</code>, the <code>watch</code> component option, and <code>this.$watch</code>. See (<a href="https://github.com/vuejs/vue-next/commit/49bb44756fda0a7019c69f2fa6b880d9e41125aa">49bb447</a>) for more details.</li> </ul> <h1><a href="https://github.com/vuejs/vue-next/compare/v3.0.0-rc.11...v3.0.0-rc.12">3.0.0-rc.12</a> (2020-09-16)</h1> <h3>Bug Fixes</h3> <ul> <li><strong>reactivity:</strong> effect should only recursively self trigger with explicit options (<a href="https://github.com/vuejs/vue-next/commit/3810de7d6bd0044177f043285228c2e988093883">3810de7</a>), closes <a href="https://redirect.github.com/vuejs/vue-next/issues/2125">#2125</a></li> <li><strong>runtime-core:</strong> ensure root stable fragments inherit elements for moving (<a href="https://github.com/vuejs/vue-next/commit/bebd44f793ccd13bfdf90c7e45eac320a340650c">bebd44f</a>), closes <a href="https://redirect.github.com/vuejs/vue-next/issues/2134">#2134</a></li> <li><strong>runtime-core:</strong> should still do full traverse of stable fragment children in dev + hmr (<a href="https://github.com/vuejs/vue-next/commit/dd40ad8fca47af0e1f0a963be2f48c23f7457952">dd40ad8</a>)</li> <li><strong>runtime-core/async-component:</strong> fix error component when there are no error handlers (<a href="https://github.com/vuejs/vue-next/commit/c7b4a379cf8627c79a01d61039d3e3b283477dc1">c7b4a37</a>), closes <a href="https://redirect.github.com/vuejs/vue-next/issues/2129">#2129</a></li> <li><strong>types/tsx:</strong> optional props from Mixin/Extends are treated as required (<a href="https://redirect.github.com/vuejs/vue-next/issues/2048">#2048</a>) (<a href="https://github.com/vuejs/vue-next/commit/89e9ab8a2a387f26a370848db0b1ffb1d0ab9549">89e9ab8</a>)</li> </ul> <h3>Features</h3> <ul> <li><strong>compiler-sfc:</strong> <code>additionalData</code> support for css preprocessors (<a href="https://redirect.github.com/vuejs/vue-next/issues/2126">#2126</a>) (<a href="https://github.com/vuejs/vue-next/commit/066d514d757fb7e8844104210d7d04cc11598fef">066d514</a>)</li> </ul> <h1><a href="https://github.com/vuejs/vue-next/compare/v3.0.0-rc.10...v3.0.0-rc.11">3.0.0-rc.11</a> (2020-09-15)</h1> <!-- raw HTML omitted --> </blockquote> <p>... (truncated)</p> </details> <details> <summary>Commits</summary> <ul> <li>See full diff in <a href="https://github.com/vuejs/core/commits/v3.0.0">compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. 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