update dependencies, autoprefixer config, navbar search input height adjustment

package.json

@@ -1,7 +1,7 @@
 {
     "title": "SB Admin 2",
     "name": "startbootstrap-sb-admin-2",
-    "version": "4.0.6",
+    "version": "4.0.7",
     "scripts": {
         "start": "node_modules/.bin/gulp watch"
     },
@@ -31,7 +31,7 @@
         "url": "https://github.com/BlackrockDigital/startbootstrap-sb-admin-2.git"
     },
     "dependencies": {
-        "@fortawesome/fontawesome-free": "5.9.0",
+        "@fortawesome/fontawesome-free": "5.10.2",
         "bootstrap": "4.3.1",
         "chart.js": "2.8.0",
         "datatables.net-bs4": "1.10.19",
@@ -40,11 +40,11 @@
     },
     "devDependencies": {
         "browser-sync": "2.26.7",
-        "del": "4.1.1",
+        "del": "5.1.0",
         "gulp": "4.0.2",
-        "gulp-autoprefixer": "6.1.0",
+        "gulp-autoprefixer": "7.0.0",
         "gulp-clean-css": "4.2.0",
-        "gulp-header": "2.0.7",
+        "gulp-header": "2.0.9",
         "gulp-plumber": "^1.2.1",
         "gulp-rename": "1.4.0",
         "gulp-sass": "4.0.2",