fix(type): update $productive-heading-05 weights to Light (300) (carb…

…on-design-system#219)

* Update $productive-heading-05 to Light weight 

$expressive-heading-04 and -05 are using the light weight at 28px; $productive-heading-05 needs to be updated to match.

* chore(type): sync to styles and snapshots

packages/type/scss/_styles.scss

@@ -116,7 +116,7 @@ $productive-heading-04: (
 $productive-heading-05: (
   font-family: font-family('sans'),
   font-size: type-scale(8),
-  font-weight: font-weight('regular'),
+  font-weight: font-weight('light'),
   line-height: rem(40px),
   letter-spacing: 0,
 ) !default;
@@ -133,14 +133,17 @@ $expressive-heading-04: (
     ),
     lg: (
       font-size: type-scale(7),
+      font-weight: font-weight('light'),
       line-height: 125%,
     ),
     xlg: (
       font-size: type-scale(7),
+      font-weight: font-weight('light'),
       line-height: 129%,
     ),
     max: (
       font-size: type-scale(8),
+      font-weight: font-weight('light'),
       line-height: 125%,
     ),
   ),

packages/type/src/__tests__/__snapshots__/styles-test.js.snap

@@ -491,7 +491,7 @@ exports[`styles productiveHeading05 should be printable 1`] = `
 Object {
   "fontFamily": "'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif",
   "fontSize": "2rem",
-  "fontWeight": 400,
+  "fontWeight": 300,
   "letterSpacing": 0,
   "lineHeight": "2.5rem",
 }
@@ -500,7 +500,7 @@ Object {
 exports[`styles productiveHeading05 should be printable 2`] = `
 "font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
 font-size: 2rem;
-font-weight: 400;
+font-weight: 300;
 line-height: 2.5rem;
 letter-spacing: 0;"
 `;

packages/type/src/styles.js

@@ -118,7 +118,7 @@ export const productiveHeading04 = {
 export const productiveHeading05 = {
   fontFamily: fontFamilies.sans,
   fontSize: rem(scale[7]),
-  fontWeight: fontWeights.regular,
+  fontWeight: fontWeights.light,
   lineHeight: rem(40),
   letterSpacing: 0,
 };