Svg text outline using filters

text-outline.svg

<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="200" height="40">
  <defs>
    <filter id="outlineFilter">
      <feMorphology in="SourceAlpha" operator="dilate" radius="2" result="outline" />
      <feFlood flood-color="white" result="chroma"/>
      <feComposite in="chroma" in2="outline" operator="in" result="glow" />
      <feMerge>
        <feMergeNode in="glow" />
        <feMergeNode in="SourceGraphic" />
      </feMerge>
    </filter>
  </defs>
  <text class="outline-text" x="10" y="30" font-size="16px" filter="url(#outlineFIlter)">Some text</text>
</svg>