Bump bootstrap from 3.3.7 to 3.4.1 in /css

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 3.3.7 to 3.4.1.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](https://github.com/twbs/bootstrap/compare/v3.3.7...v3.4.1)

Signed-off-by: dependabot[bot] <support@github.com>

css/package-lock.json

@@ -88,14 +88,15 @@
             "version": "2.10.1",
             "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
             "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
+            "optional": true,
             "requires": {
                 "hoek": "2.x.x"
             }
         },
         "bootstrap": {
-            "version": "3.3.7",
+            "version": "3.4.1",
-            "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-3.3.7.tgz",
+            "resolved": "https://registry.npmjs.org/bootstrap/-/bootstrap-3.4.1.tgz",
-            "integrity": "sha1-WjiTlFSfIzMIdaOxUGVldPip63E="
+            "integrity": "sha512-yN5oZVmRCwe5aKwzRj6736nSmKDX7pLYwsXiCj/EYmo16hODaBiT4En5btW/jhBF/seV+XMx3aYwukYC3A49DA=="
         },
         "brace-expansion": {
             "version": "1.1.11",
@@ -141,6 +142,7 @@
             "version": "1.0.6",
             "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
             "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
+            "optional": true,
             "requires": {
                 "delayed-stream": "~1.0.0"
             }
@@ -227,7 +229,8 @@
         "delayed-stream": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
-            "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
+            "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk=",
+            "optional": true
         },
         "depd": {
             "version": "1.1.2",
@@ -296,7 +299,8 @@
         "extsprintf": {
             "version": "1.3.0",
             "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
-            "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU="
+            "integrity": "sha1-lpGEQOMEGnpBT4xS48V06zw+HgU=",
+            "optional": true
         },
         "finalhandler": {
             "version": "1.1.0",
@@ -452,7 +456,8 @@
         "hoek": {
             "version": "2.16.3",
             "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
-            "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0="
+            "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
+            "optional": true
         },
         "hpack.js": {
             "version": "2.1.6",
@@ -663,12 +668,14 @@
         "mime-db": {
             "version": "1.33.0",
             "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.33.0.tgz",
-            "integrity": "sha512-BHJ/EKruNIqJf/QahvxwQZXKygOQ256myeN/Ew+THcAa5q+PjyTTMMeNQC4DZw5AwfvelsUrA6B67NKMqXDbzQ=="
+            "integrity": "sha512-BHJ/EKruNIqJf/QahvxwQZXKygOQ256myeN/Ew+THcAa5q+PjyTTMMeNQC4DZw5AwfvelsUrA6B67NKMqXDbzQ==",
+            "optional": true
         },
         "mime-types": {
             "version": "2.1.18",
             "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.18.tgz",
             "integrity": "sha512-lc/aahn+t4/SWV/qcmumYjymLsWfN3ELhpmVuUFjgsORruuZPVSwAQryq+HHGvO/SI2KVX26bx+En+zhM8g8hQ==",
+            "optional": true,
             "requires": {
                 "mime-db": "~1.33.0"
             }

css/package.json

@@ -11,7 +11,7 @@
         "url": "https://tildegit.org/team/site/issues"
     },
     "dependencies": {
-        "bootstrap": "3.3.7",
+        "bootstrap": "3.4.1",
         "less": "2.7.3",
         "less-plugin-clean-css": "1.5.1",
         "light-server": "^2.5.1"

css/yarn.lock

@@ -65,9 +65,9 @@ boom@2.x.x:
   dependencies:
     hoek "2.x.x"
 
-bootstrap@3.3.7:
+bootstrap@3.4.1:
-  version "3.3.7"
+  version "3.4.1"
-  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-3.3.7.tgz#5a389394549f23330875a3b150656574f8a9eb71"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-3.4.1.tgz#c3a347d419e289ad11f4033e3c4132b87c081d72"
 
 brace-expansion@^1.1.7:
   version "1.1.11"