Update grunt-related packages

Old package.json resulted in version conflicts when installing the
grunt.

Also caused css/clean-blog.css to be slightly changed (uppercase color
defs and the like).

css/clean-blog.css

+/*!
+ * Clean Blog v1.0.0 (http://startbootstrap.com)
+ * Copyright 2023 Start Bootstrap
+ * Licensed under Apache 2.0 (https://github.com/IronSummitMedia/startbootstrap/blob/gh-pages/LICENSE)
+ */
+
 body {
   font-family: 'Lora', 'Times New Roman', serif;
   font-size: 20px;
@@ -24,7 +30,7 @@ a {
 }
 a:hover,
 a:focus {
-  color: #0085a1;
+  color: #0085A1;
 }
 a img:hover,
 a img:focus {
@@ -74,7 +80,6 @@ hr.small {
   .navbar-custom .nav li a {
     color: white;
     padding: 20px;
-    text-decoration: none;
   }
   .navbar-custom .nav li a:hover,
   .navbar-custom .nav li a:focus {
@@ -110,14 +115,14 @@ hr.small {
   }
   .navbar-custom.is-fixed .navbar-brand:hover,
   .navbar-custom.is-fixed .navbar-brand:focus {
-    color: #0085a1;
+    color: #0085A1;
   }
   .navbar-custom.is-fixed .nav li a {
     color: #404040;
   }
   .navbar-custom.is-fixed .nav li a:hover,
   .navbar-custom.is-fixed .nav li a:focus {
-    color: #0085a1;
+    color: #0085A1;
   }
   .navbar-custom.is-visible {
     /* if the user changes the scrolling direction, we show the header */
@@ -162,11 +167,11 @@ hr.small {
 }
 .intro-header .site-heading .subheading,
 .intro-header .page-heading .subheading {
-  font-size: 20px;
+  font-size: 24px;
   line-height: 1.1;
   display: block;
   font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
-  font-weight: 400;
+  font-weight: 300;
   margin: 10px 0 0;
 }
 @media only screen and (min-width: 768px) {
@@ -208,12 +213,11 @@ hr.small {
 }
 .post-preview > a {
   color: #404040;
-  text-decoration: none;
 }
 .post-preview > a:hover,
 .post-preview > a:focus {
   text-decoration: none;
-  color: #0085a1;
+  color: #0085A1;
 }
 .post-preview > a > .post-title {
   font-size: 30px;
@@ -237,7 +241,7 @@ hr.small {
 }
 .post-preview > .post-meta > a:hover,
 .post-preview > .post-meta > a:focus {
-  color: #0085a1;
+  color: #0085A1;
   text-decoration: underline;
 }
 @media only screen and (min-width: 768px) {
@@ -277,7 +281,7 @@ footer .copyright {
   position: relative;
   margin-bottom: 0;
   padding-bottom: 0.5em;
-  border-bottom: 1px solid #eeeeee;
+  border-bottom: 1px solid #eee;
 }
 .floating-label-form-group input,
 .floating-label-form-group textarea {
@@ -299,28 +303,28 @@ footer .copyright {
   top: 2em;
   margin: 0;
   font-size: 0.85em;
-  line-height: 1.764705882em;
+  line-height: 1.76470588em;
   vertical-align: middle;
   vertical-align: baseline;
   opacity: 0;
-  -webkit-transition: top 0.3s ease,opacity 0.3s ease;
-  -moz-transition: top 0.3s ease,opacity 0.3s ease;
-  -ms-transition: top 0.3s ease,opacity 0.3s ease;
-  transition: top 0.3s ease,opacity 0.3s ease;
+  -webkit-transition: top 0.3s ease, opacity 0.3s ease;
+  -moz-transition: top 0.3s ease, opacity 0.3s ease;
+  -ms-transition: top 0.3s ease, opacity 0.3s ease;
+  transition: top 0.3s ease, opacity 0.3s ease;
 }
 .floating-label-form-group::not(:first-child) {
   padding-left: 14px;
-  border-left: 1px solid #eeeeee;
+  border-left: 1px solid #eee;
 }
 .floating-label-form-group-with-value label {
   top: 0;
   opacity: 1;
 }
 .floating-label-form-group-with-focus label {
-  color: #0085a1;
+  color: #0085A1;
 }
 form .row:first-child .floating-label-form-group {
-  border-top: 1px solid #eeeeee;
+  border-top: 1px solid #eee;
 }
 .btn {
   font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
@@ -337,8 +341,8 @@ form .row:first-child .floating-label-form-group {
 }
 .btn-default:hover,
 .btn-default:focus {
-  background-color: #0085a1;
-  border: 1px solid #0085a1;
+  background-color: #0085A1;
+  border: 1px solid #0085A1;
   color: white;
 }
 .pager {
@@ -365,8 +369,8 @@ form .row:first-child .floating-label-form-group {
 .pager li > a:hover,
 .pager li > a:focus {
   color: white;
-  background-color: #0085a1;
-  border: 1px solid #0085a1;
+  background-color: #0085A1;
+  border: 1px solid #0085A1;
 }
 .pager .disabled > a,
 .pager .disabled > a:hover,
@@ -379,12 +383,12 @@ form .row:first-child .floating-label-form-group {
 ::-moz-selection {
   color: white;
   text-shadow: none;
-  background: #0085a1;
+  background: #0085A1;
 }
 ::selection {
   color: white;
   text-shadow: none;
-  background: #0085a1;
+  background: #0085A1;
 }
 img::selection {
   color: white;
@@ -395,5 +399,5 @@ img::-moz-selection {
   background: transparent;
 }
 body {
-  webkit-tap-highlight-color: #0085a1;
+  webkit-tap-highlight-color: #0085A1;
 }

package.json

@@ -9,11 +9,11 @@
         "url": "https://github.com/IronSummitMedia/startbootstrap/blob/gh-pages/LICENSE"
     },
     "devDependencies": {
-        "grunt": ">=1.3.0",
-        "grunt-contrib-less": "~0.11.4",
-        "grunt-contrib-watch": "~0.6.1",
+        "grunt": "^1.6.1",
+        "grunt-contrib-less": "~3.0.0",
+        "grunt-contrib-watch": "~1.1.0",
         "grunt-banner": "~0.2.3",
-        "grunt-contrib-uglify": "~0.5.1"
+        "grunt-contrib-uglify": "~5.2.2"
     },
     "repository": {
         "type": "git",