Upgrade all packages to latest version

The new TailwindCSS (v2.x) has different colours from the earlier
one (v1.x), but the old ones were nicer and more muted so we
changed them back!

package.json

@@ -1,19 +1,20 @@
 {
   "dependencies": {
-    "@fullhuman/postcss-purgecss": "^2.1.0",
+    "@11ty/eleventy": "^0.12.1",
-    "autoprefixer": "^9.7.5",
+    "@fullhuman/postcss-purgecss": "^4.0.3",
-    "cssnano": "^4.1.10",
+    "autoprefixer": "^10.3.7",
+    "cssnano": "^5.0.8",
     "npm-run-all": "^4.1.5",
-    "postcss-import": "^12.0.1",
+    "postcss-cli": "^9.0.1",
-    "tailwindcss": "^1.2.0",
+    "postcss-import": "^14.0.2",
-    "watch": "^1.0.2",
+    "tailwindcss": "^2.2.17",
-    "@11ty/eleventy": "^0.10.0",
+    "watch": "^1.0.2"
-    "postcss-cli": "^7.1.0"
   },
   "scripts": {
     "build": "npm-run-all build:css build:html",
     "build:css": "postcss src/style.css -o dist/style.css",
     "build:html": "eleventy",
     "watch": "watch 'npm run build' ./src"
-  }
+  },
+  "devDependencies": {}
 }

tailwind.config.js

@@ -5,7 +5,125 @@ module.exports = {
       'serif': [ 'Crimson Text', 'Crimson Pro', 'Georgia', 'ui-serif', ],
       'heading': [ 'Abhaya Libre', 'ui-serif' ],
       'sans': [ 'Open Sans', 'sans-serif' ],
-    }
+    },
+    colors: {
+      transparent: 'transparent',
+      current: 'currentColor',
+
+      black: '#000',
+      white: '#fff',
+
+      gray: {
+        100: '#f7fafc',
+        200: '#edf2f7',
+        300: '#e2e8f0',
+        400: '#cbd5e0',
+        500: '#a0aec0',
+        600: '#718096',
+        700: '#4a5568',
+        800: '#2d3748',
+        900: '#1a202c',
+      },
+      red: {
+        100: '#fff5f5',
+        200: '#fed7d7',
+        300: '#feb2b2',
+        400: '#fc8181',
+        500: '#f56565',
+        600: '#e53e3e',
+        700: '#c53030',
+        800: '#9b2c2c',
+        900: '#742a2a',
+      },
+      orange: {
+        100: '#fffaf0',
+        200: '#feebc8',
+        300: '#fbd38d',
+        400: '#f6ad55',
+        500: '#ed8936',
+        600: '#dd6b20',
+        700: '#c05621',
+        800: '#9c4221',
+        900: '#7b341e',
+      },
+      yellow: {
+        100: '#fffff0',
+        200: '#fefcbf',
+        300: '#faf089',
+        400: '#f6e05e',
+        500: '#ecc94b',
+        600: '#d69e2e',
+        700: '#b7791f',
+        800: '#975a16',
+        900: '#744210',
+      },
+      green: {
+        100: '#f0fff4',
+        200: '#c6f6d5',
+        300: '#9ae6b4',
+        400: '#68d391',
+        500: '#48bb78',
+        600: '#38a169',
+        700: '#2f855a',
+        800: '#276749',
+        900: '#22543d',
+      },
+      teal: {
+        100: '#e6fffa',
+        200: '#b2f5ea',
+        300: '#81e6d9',
+        400: '#4fd1c5',
+        500: '#38b2ac',
+        600: '#319795',
+        700: '#2c7a7b',
+        800: '#285e61',
+        900: '#234e52',
+      },
+      blue: {
+        100: '#ebf8ff',
+        200: '#bee3f8',
+        300: '#90cdf4',
+        400: '#63b3ed',
+        500: '#4299e1',
+        600: '#3182ce',
+        700: '#2b6cb0',
+        800: '#2c5282',
+        900: '#2a4365',
+      },
+      indigo: {
+        100: '#ebf4ff',
+        200: '#c3dafe',
+        300: '#a3bffa',
+        400: '#7f9cf5',
+        500: '#667eea',
+        600: '#5a67d8',
+        700: '#4c51bf',
+        800: '#434190',
+        900: '#3c366b',
+      },
+      purple: {
+        100: '#faf5ff',
+        200: '#e9d8fd',
+        300: '#d6bcfa',
+        400: '#b794f4',
+        500: '#9f7aea',
+        600: '#805ad5',
+        700: '#6b46c1',
+        800: '#553c9a',
+        900: '#44337a',
+      },
+      pink: {
+        100: '#fff5f7',
+        200: '#fed7e2',
+        300: '#fbb6ce',
+        400: '#f687b3',
+        500: '#ed64a6',
+        600: '#d53f8c',
+        700: '#b83280',
+        800: '#97266d',
+        900: '#702459',
+      },
+    },
   },
   variants: {},
   plugins: [],