Add strava social icon

data/webpack_assets.json

 {
   "app": {
     "js": "js/app.3fc0f988d21662902933.js",
-    "css": "css/app.3f5912c237ddd38c8e76debe081c7ca7.css"
+    "css": "css/app.bc20b5435312ad8378d94eaeacc9cc6a.css"
   }
 }

exampleSite/config.toml

   mastodon = ""
   slack = ""
   stackoverflow = ""
+  strava = ""
   # choose a background color from any on this page: http://tachyons.io/docs/themes/skins/ and preface it with "bg-"
   background_color_class = "bg-black"
   featured_image = "/images/gohugo-default-sample-hero-image.jpg"

layouts/partials/social-follow.html

   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
+{{ with .Param "strava" }}
+<a href="{{ . }}" target="_blank" class="link-transition strava link dib z-999 pt3 pt0-l mr1" title="Strava link" rel="noopener" aria-label="follow on Strava——Opens in a new window">
+  {{ partial "svg/strava.svg" (dict "size" $icon_size) }}
+  {{- partial "new-window-icon.html" . -}}
+</a>
+{{ end }}
+

layouts/partials/svg/strava.svg

+<svg {{ with .size }} height="{{ . }}" {{ end }} style="enable-background:new 0 0 512 512;" version="1.1" viewBox="0 0 512 512" width="{{ .size }}" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <path d="M256,0 C397.376,0 512,114.624 512,256 C512,397.376 397.376,512 256,512 C114.624,512 0,397.376 0,256 C0,114.624 114.624,0 256,0 Z M228.5,282 L308.749975,440 L388.5,282 L340.148124,282 L308.749179,345.343408 L276.850284,282 L339.5,282 L232.42767,73 L124.5,282 L188.088007,282 L232.42767,198.900783 L276.411868,282 L228.5,282 Z" style="fill-rule:evenodd;clip-rule:evenodd;fill:{{ .fill }};"/>
+</svg>

src/css/_social-icons.css

-.facebook, .twitter, .instagram, .youtube, .github, .gitlab, .linkedin, .medium, .mastodon, .slack, .stackoverflow {
+.facebook, .twitter, .instagram, .youtube, .github, .gitlab, .linkedin, .medium, .mastodon, .slack, .stackoverflow, .strava {
   fill: #BABABA;
 }
 
 .stackoverflow:hover {
   fill: #f48024;
 }
+
+.strava:hover {
+  fill: #f93a06;
+}