update bootstrap 4.3.1, update gulpfile, npm start script added, change SCSS file names for proper compiling

vendor/fontawesome-free/css/all.css

@@ -1,7 +1,3 @@
-/*!
- * Font Awesome Free 5.6.3 by @fontawesome - https://fontawesome.com
- * License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License)
- */
 .fa,
 .fas,
 .far,
@@ -148,7 +144,7 @@
   -webkit-transform: scale(1, -1);
           transform: scale(1, -1); }
 
-.fa-flip-horizontal.fa-flip-vertical {
+.fa-flip-both, .fa-flip-horizontal.fa-flip-vertical {
   -ms-filter: "progid:DXImageTransform.Microsoft.BasicImage(rotation=2, mirror=1)";
   -webkit-transform: scale(-1, -1);
           transform: scale(-1, -1); }
@@ -157,7 +153,8 @@
 :root .fa-rotate-180,
 :root .fa-rotate-270,
 :root .fa-flip-horizontal,
-:root .fa-flip-vertical {
+:root .fa-flip-vertical,
+:root .fa-flip-both {
   -webkit-filter: none;
           filter: none; }
 
@@ -433,6 +430,9 @@ readers do not read off random characters that represent icons */
 .fa-backward:before {
   content: "\f04a"; }
 
+.fa-bacon:before {
+  content: "\f7e5"; }
+
 .fa-balance-scale:before {
   content: "\f24e"; }
 
@@ -574,6 +574,9 @@ readers do not read off random characters that represent icons */
 .fa-book-dead:before {
   content: "\f6b7"; }
 
+.fa-book-medical:before {
+  content: "\f7e6"; }
+
 .fa-book-open:before {
   content: "\f518"; }
 
@@ -601,6 +604,9 @@ readers do not read off random characters that represent icons */
 .fa-brain:before {
   content: "\f5dc"; }
 
+.fa-bread-slice:before {
+  content: "\f7ec"; }
+
 .fa-briefcase:before {
   content: "\f0b1"; }
 
@@ -826,6 +832,9 @@ readers do not read off random characters that represent icons */
 .fa-check-square:before {
   content: "\f14a"; }
 
+.fa-cheese:before {
+  content: "\f7ef"; }
+
 .fa-chess:before {
   content: "\f439"; }
 
@@ -892,6 +901,9 @@ readers do not read off random characters that represent icons */
 .fa-city:before {
   content: "\f64f"; }
 
+.fa-clinic-medical:before {
+  content: "\f7f2"; }
+
 .fa-clipboard:before {
   content: "\f328"; }
 
@@ -991,6 +1003,9 @@ readers do not read off random characters that represent icons */
 .fa-comment-dots:before {
   content: "\f4ad"; }
 
+.fa-comment-medical:before {
+  content: "\f7f5"; }
+
 .fa-comment-slash:before {
   content: "\f4b3"; }
 
@@ -1108,6 +1123,9 @@ readers do not read off random characters that represent icons */
 .fa-crown:before {
   content: "\f521"; }
 
+.fa-crutch:before {
+  content: "\f7f7"; }
+
 .fa-css3:before {
   content: "\f13c"; }
 
@@ -1324,6 +1342,9 @@ readers do not read off random characters that represent icons */
 .fa-edit:before {
   content: "\f044"; }
 
+.fa-egg:before {
+  content: "\f7fb"; }
+
 .fa-eject:before {
   content: "\f052"; }
 
@@ -1903,6 +1924,9 @@ readers do not read off random characters that represent icons */
 .fa-hackerrank:before {
   content: "\f5f7"; }
 
+.fa-hamburger:before {
+  content: "\f805"; }
+
 .fa-hammer:before {
   content: "\f6e3"; }
 
@@ -1921,6 +1945,9 @@ readers do not read off random characters that represent icons */
 .fa-hand-lizard:before {
   content: "\f258"; }
 
+.fa-hand-middle-finger:before {
+  content: "\f806"; }
+
 .fa-hand-paper:before {
   content: "\f256"; }
 
@@ -1963,6 +1990,9 @@ readers do not read off random characters that represent icons */
 .fa-hanukiah:before {
   content: "\f6e6"; }
 
+.fa-hard-hat:before {
+  content: "\f807"; }
+
 .fa-hashtag:before {
   content: "\f292"; }
 
@@ -2050,6 +2080,9 @@ readers do not read off random characters that represent icons */
 .fa-hot-tub:before {
   content: "\f593"; }
 
+.fa-hotdog:before {
+  content: "\f80f"; }
+
 .fa-hotel:before {
   content: "\f594"; }
 
@@ -2086,6 +2119,9 @@ readers do not read off random characters that represent icons */
 .fa-i-cursor:before {
   content: "\f246"; }
 
+.fa-ice-cream:before {
+  content: "\f810"; }
+
 .fa-icicles:before {
   content: "\f7ad"; }
 
@@ -2242,6 +2278,9 @@ readers do not read off random characters that represent icons */
 .fa-laptop-code:before {
   content: "\f5fc"; }
 
+.fa-laptop-medical:before {
+  content: "\f812"; }
+
 .fa-laravel:before {
   content: "\f3bd"; }
 
@@ -2668,6 +2707,9 @@ readers do not read off random characters that represent icons */
 .fa-pagelines:before {
   content: "\f18c"; }
 
+.fa-pager:before {
+  content: "\f815"; }
+
 .fa-paint-brush:before {
   content: "\f1fc"; }
 
@@ -2752,6 +2794,9 @@ readers do not read off random characters that represent icons */
 .fa-people-carry:before {
   content: "\f4ce"; }
 
+.fa-pepper-hot:before {
+  content: "\f816"; }
+
 .fa-percent:before {
   content: "\f295"; }
 
@@ -2815,6 +2860,9 @@ readers do not read off random characters that represent icons */
 .fa-pinterest-square:before {
   content: "\f0d3"; }
 
+.fa-pizza-slice:before {
+  content: "\f818"; }
+
 .fa-place-of-worship:before {
   content: "\f67f"; }
 
@@ -3745,6 +3793,12 @@ readers do not read off random characters that represent icons */
 .fa-trash-alt:before {
   content: "\f2ed"; }
 
+.fa-trash-restore:before {
+  content: "\f829"; }
+
+.fa-trash-restore-alt:before {
+  content: "\f82a"; }
+
 .fa-tree:before {
   content: "\f1bb"; }
 
@@ -3901,6 +3955,9 @@ readers do not read off random characters that represent icons */
 .fa-user-ninja:before {
   content: "\f504"; }
 
+.fa-user-nurse:before {
+  content: "\f82f"; }
+
 .fa-user-plus:before {
   content: "\f234"; }
 
@@ -4198,6 +4255,7 @@ readers do not read off random characters that represent icons */
   font-family: 'Font Awesome 5 Brands';
   font-style: normal;
   font-weight: normal;
+  font-display: auto;
   src: url("../webfonts/fa-brands-400.eot");
   src: url("../webfonts/fa-brands-400.eot?#iefix") format("embedded-opentype"), url("../webfonts/fa-brands-400.woff2") format("woff2"), url("../webfonts/fa-brands-400.woff") format("woff"), url("../webfonts/fa-brands-400.ttf") format("truetype"), url("../webfonts/fa-brands-400.svg#fontawesome") format("svg"); }
 
@@ -4207,6 +4265,7 @@ readers do not read off random characters that represent icons */
   font-family: 'Font Awesome 5 Free';
   font-style: normal;
   font-weight: 400;
+  font-display: auto;
   src: url("../webfonts/fa-regular-400.eot");
   src: url("../webfonts/fa-regular-400.eot?#iefix") format("embedded-opentype"), url("../webfonts/fa-regular-400.woff2") format("woff2"), url("../webfonts/fa-regular-400.woff") format("woff"), url("../webfonts/fa-regular-400.ttf") format("truetype"), url("../webfonts/fa-regular-400.svg#fontawesome") format("svg"); }
 
@@ -4217,6 +4276,7 @@ readers do not read off random characters that represent icons */
   font-family: 'Font Awesome 5 Free';
   font-style: normal;
   font-weight: 900;
+  font-display: auto;
   src: url("../webfonts/fa-solid-900.eot");
   src: url("../webfonts/fa-solid-900.eot?#iefix") format("embedded-opentype"), url("../webfonts/fa-solid-900.woff2") format("woff2"), url("../webfonts/fa-solid-900.woff") format("woff"), url("../webfonts/fa-solid-900.ttf") format("truetype"), url("../webfonts/fa-solid-900.svg#fontawesome") format("svg"); }