Merge pull request #126 from abaracedo/issue-125

issue-125: Add support for font-display

Author: Wliu

grammars/css.cson

@@ -1381,7 +1381,7 @@
           |crisp-edges|crispEdges|crosshair|cyclic|darken|dashed|decimal|default|dense|diagonal-fractions|difference|digits|disabled|disc|discretionary-ligatures
           |distribute|distribute-all-lines|distribute-letter|distribute-space|dot|dotted|double|double-circle|downleft|downright|e-resize|each-line|ease|ease-in
           |ease-in-out|ease-out|economy|ellipse|ellipsis|embed|end|evenodd|ew-resize|exact|exclude|exclusion|expanded|extends|extra-condensed|extra-expanded
-          |farthest-corner|farthest-side|fill|fill-available|fill-box|filled|fit-content|fixed|flat|flex|flex-end|flex-start|flip|forwards|freeze
+          |fallback|farthest-corner|farthest-side|fill|fill-available|fill-box|filled|fit-content|fixed|flat|flex|flex-end|flex-start|flip|forwards|freeze
           |from-image|full-width|geometricPrecision|georgian|grab|grabbing|grayscale|grid|groove|hand|hanging|hard-light|help|hidden|hide
           |historical-forms|historical-ligatures|horizontal|horizontal-tb|hue|icon|ideograph-alpha|ideograph-numeric|ideograph-parenthesis|ideograph-space
           |ideographic|inactive|infinite|inherit|initial|inline|inline-axis|inline-block|inline-end|inline-flex|inline-grid|inline-list-item|inline-start
@@ -1391,13 +1391,13 @@
           |match-source|mathematical|max-content|medium|menu|message-box|middle|min-content|miter|mixed|move|multiply|n-resize|narrower|ne-resize
           |nearest-neighbor|nesw-resize|newspaper|no-change|no-clip|no-close-quote|no-common-ligatures|no-contextual|no-discretionary-ligatures
           |no-drop|no-historical-ligatures|no-open-quote|no-repeat|none|nonzero|normal|not-allowed|nowrap|ns-resize|numbers|numeric|nw-resize|nwse-resize
-          |oblique|oldstyle-nums|open|open-quote|optimizeLegibility|optimizeQuality|optimizeSpeed|ordinal|outset|outside|over|overlay|overline|padding
+          |oblique|oldstyle-nums|open|open-quote|optimizeLegibility|optimizeQuality|optimizeSpeed|optional|ordinal|outset|outside|over|overlay|overline|padding
           |padding-box|page|painted|pan-down|pan-left|pan-right|pan-up|pan-x|pan-y|paused|petite-caps|pixelated|plaintext|pointer|portrait|pre|pre-line
           |pre-wrap|preserve-3d|progress|progressive|proportional-nums|proportional-width|proximity|radial|recto|region|relative|remove|repeat|repeat-[xy]
           |reset-size|reverse|revert|ridge|right|rl|rl-tb|round|row|row-resize|row-reverse|row-severse|rtl|ruby|ruby-base|ruby-base-container|ruby-text
           |ruby-text-container|run-in|running|s-resize|saturation|scale-down|screen|scroll|scroll-position|se-resize|semi-condensed|semi-expanded|separate
           |sesame|show|sideways|sideways-left|sideways-lr|sideways-right|sideways-rl|simplified|slashed-zero|slice|small|small-caps|small-caption|smaller
-          |smooth|soft-light|solid|space|space-around|space-between|spell-out|square|sRGB|stacked-fractions|start|static|status-bar|step-end|step-start
+          |smooth|soft-light|solid|space|space-around|space-between|spell-out|square|sRGB|stacked-fractions|start|static|status-bar|swap|step-end|step-start
           |sticky|stretch|strict|stroke|stroke-box|style|sub|subgrid|subpixel-antialiased|subtract|super|sw-resize|symbolic|table|table-caption|table-cell
           |table-column|table-column-group|table-footer-group|table-header-group|table-row|table-row-group|tabular-nums|tb|tb-rl|text|text-after-edge
           |text-before-edge|text-bottom|text-top|thick|thin|titling-caps|top|top-outside|touch|traditional|transparent|triangle|ultra-condensed|ultra-expanded
@@ -1455,7 +1455,7 @@
             | column-count|column-fill|column-gap|column-rule|column-rule-color|column-rule-style|column-rule-width
             | column-span|column-width|columns|content|counter-increment|counter-reset|cursor|direction|display
             | empty-cells|filter|flex|flex-basis|flex-direction|flex-flow|flex-grow|flex-shrink|flex-wrap|float
-            | font|font-family|font-feature-settings|font-kerning|font-language-override|font-size|font-size-adjust
+            | font|font-display|font-family|font-feature-settings|font-kerning|font-language-override|font-size|font-size-adjust
             | font-stretch|font-style|font-synthesis|font-variant|font-variant-alternates|font-variant-caps
             | font-variant-east-asian|font-variant-ligatures|font-variant-numeric|font-variant-position|font-weight
             | grid|grid-area|grid-auto-columns|grid-auto-flow|grid-auto-rows|grid-column|grid-column-end|grid-column-gap