Bump elliptic from 6.5.2 to 6.5.4 in /css

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.2 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](indutny/elliptic@v6.5.2...v6.5.4)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

css/yarn.lock

@@ -371,10 +371,10 @@ bluebird@^3.5.5:
   resolved "https://registry.npmjs.org/bluebird/-/bluebird-3.7.2.tgz"
   integrity sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg==
 
-bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.4.0:
-  version "4.11.9"
-  resolved "https://registry.npmjs.org/bn.js/-/bn.js-4.11.9.tgz"
-  integrity sha512-E6QoYqCKZfgatHTdHzs1RRKP7ip4vvm+EyRUeE2RF0NblwVvb0p6jSVeNTOFxPn26QXN2o6SMfNxKp6kU8zQaw==
+bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.11.9:
+  version "4.12.0"
+  resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.12.0.tgz#775b3f278efbb9718eec7361f483fb36fbbfea88"
+  integrity sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==
 
 bn.js@^5.1.1:
   version "5.1.2"
@@ -417,9 +417,9 @@ braces@~3.0.2:
   dependencies:
     fill-range "^7.0.1"
 
-brorand@^1.0.1:
+brorand@^1.0.1, brorand@^1.1.0:
   version "1.1.0"
-  resolved "https://registry.npmjs.org/brorand/-/brorand-1.1.0.tgz"
+  resolved "https://registry.yarnpkg.com/brorand/-/brorand-1.1.0.tgz#12c25efe40a45e3c323eb8675a0a0ce57b22371f"
   integrity sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8=
 
 browserify-aes@^1.0.0, browserify-aes@^1.0.4:
@@ -1186,17 +1186,17 @@ electron-to-chromium@^1.3.413:
   integrity sha512-4lwnxp+ArqOX9hiLwLpwhfqvwzUHFuDgLz4NTiU3lhygUzWtocIJ/5Vix+mWVNE2HQ9aI1k2ncGe5H/0OktMvA==
 
 elliptic@^6.0.0, elliptic@^6.5.2:
-  version "6.5.2"
-  resolved "https://registry.npmjs.org/elliptic/-/elliptic-6.5.2.tgz"
-  integrity sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.4.tgz#da37cebd31e79a1367e941b592ed1fbebd58abbb"
+  integrity sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==
   dependencies:
-    bn.js "^4.4.0"
-    brorand "^1.0.1"
+    bn.js "^4.11.9"
+    brorand "^1.1.0"
     hash.js "^1.0.0"
-    hmac-drbg "^1.0.0"
-    inherits "^2.0.1"
-    minimalistic-assert "^1.0.0"
-    minimalistic-crypto-utils "^1.0.0"
+    hmac-drbg "^1.0.1"
+    inherits "^2.0.4"
+    minimalistic-assert "^1.0.1"
+    minimalistic-crypto-utils "^1.0.1"
 
 emoji-regex@^7.0.1:
   version "7.0.3"
@@ -1692,7 +1692,7 @@ hash-base@^3.0.0:
 
 hash.js@^1.0.0, hash.js@^1.0.3:
   version "1.1.7"
-  resolved "https://registry.npmjs.org/hash.js/-/hash.js-1.1.7.tgz"
+  resolved "https://registry.yarnpkg.com/hash.js/-/hash.js-1.1.7.tgz#0babca538e8d4ee4a0f8988d68866537a003cf42"
   integrity sha512-taOaskGt4z4SOANNseOviYDvjEJinIkRgmp7LbKP2YTTmVxWBl87s/uzK9r+44BclBSp2X7K1hqeNfz9JbBeXA==
   dependencies:
     inherits "^2.0.3"
@@ -1703,9 +1703,9 @@ hex-color-regex@^1.1.0:
   resolved "https://registry.npmjs.org/hex-color-regex/-/hex-color-regex-1.1.0.tgz"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
-hmac-drbg@^1.0.0:
+hmac-drbg@^1.0.1:
   version "1.0.1"
-  resolved "https://registry.npmjs.org/hmac-drbg/-/hmac-drbg-1.0.1.tgz"
+  resolved "https://registry.yarnpkg.com/hmac-drbg/-/hmac-drbg-1.0.1.tgz#d2745701025a6c775a6c545793ed502fc0c649a1"
   integrity sha1-0nRXAQJabHdabFRXk+1QL8DGSaE=
   dependencies:
     hash.js "^1.0.3"
@@ -2334,12 +2334,12 @@ mimic-fn@^2.0.0:
 
 minimalistic-assert@^1.0.0, minimalistic-assert@^1.0.1:
   version "1.0.1"
-  resolved "https://registry.npmjs.org/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz"
+  resolved "https://registry.yarnpkg.com/minimalistic-assert/-/minimalistic-assert-1.0.1.tgz#2e194de044626d4a10e7f7fbc00ce73e83e4d5c7"
   integrity sha512-UtJcAD4yEaGtjPezWuO9wC4nwUnVH/8/Im3yEHQP4b67cXlD/Qr9hdITCU1xDbSEXg2XKNaP8jsReV7vQd00/A==
 
-minimalistic-crypto-utils@^1.0.0, minimalistic-crypto-utils@^1.0.1:
+minimalistic-crypto-utils@^1.0.1:
   version "1.0.1"
-  resolved "https://registry.npmjs.org/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz"
+  resolved "https://registry.yarnpkg.com/minimalistic-crypto-utils/-/minimalistic-crypto-utils-1.0.1.tgz#f6c00c1c0b082246e5c4d99dfb8c7c083b2b582a"
   integrity sha1-9sAMHAsIIkblxNmd+4x8CDsrWCo=
 
 minimatch@^3.0.4: