Revert "Upgrade Javascript dependencies"

This reverts commit 90bb17f4.

package.json

@@ -6,7 +6,7 @@
     "repository": "https://homeproj.cesnet.cz/git/mentat-ng.git",
     "license": "MIT",
     "devDependencies": {
-        "grunt": "1.5.3",
+        "grunt": "~1.0.2",
         "grunt-chmod": "~1.1.1",
         "grunt-contrib-clean": "~1.1.0",
         "grunt-contrib-concat": "~1.0.1",
@@ -16,30 +16,30 @@
         "grunt-shell": "~1.1.2",
         "grunt-stripcomments": "^0.7.2",
         "grunt-template": "~1.0.0",
-        "load-grunt-tasks": "~5.1.0",
+        "load-grunt-tasks": "~3.2.0",
         "npm-shrinkwrap": "~6.1.0",
-        "time-grunt": "~2.0.0"
+        "time-grunt": "~1.2.1"
     },
     "dependencies": {
-        "@fortawesome/fontawesome-free": "^6.4.0",
+        "@fortawesome/fontawesome-free": "^5.6.1",
         "@popperjs/core": "^2.1.0",
-        "bootstrap": "^5.2.3",
+        "bootstrap": "^3.4.0",
         "bootstrap-datepicker": "^1.7.1",
         "bootstrap-select": "^1.13.5",
-        "bootswatch": "^5.2.3",
-        "cldr-core": "^42.0.0",
-        "cldr-data": "^36.0.1",
-        "cldr-dates-modern": "^42.0.0",
-        "cldr-localenames-modern": "^42.0.0",
-        "cldr-misc-modern": "^42.0.0",
-        "cldr-numbers-modern": "^42.0.0",
-        "cldr-rbnf": "^42.0.0",
-        "cldr-segments-modern": "^42.0.0",
-        "cldr-units-modern": "^42.0.0",
-        "d3": "7.8.4",
+        "bootswatch": "^3.3.7",
+        "cldr-core": "^34.0.0",
+        "cldr-data": "^34.0.0",
+        "cldr-dates-modern": "^34.0.0",
+        "cldr-localenames-modern": "^34.0.0",
+        "cldr-misc-modern": "^34.0.0",
+        "cldr-numbers-modern": "^34.0.0",
+        "cldr-rbnf": "^34.0.0",
+        "cldr-segments-modern": "^34.0.0",
+        "cldr-units-modern": "^34.0.0",
+        "d3": "3.5.17",
         "eonasdan-bootstrap-datetimepicker": "^4.17.47",
         "globalize": "^1.4.0",
-        "iana-tz-data": "^2019.1.0",
+        "iana-tz-data": "^2018.5.0",
         "jquery": "^3.3.1",
         "moment": "^2.23.0",
         "moment-timezone": "^0.5.23",