Bump lodash from 4.17.15 to 4.17.21

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.15...4.17.21)

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

Author: dependabot[bot]

yarn.lock

@@ -198,9 +198,9 @@
   version "7946.0.7"
   resolved "https://registry.yarnpkg.com/@types/geojson/-/geojson-7946.0.7.tgz#c8fa532b60a0042219cdf173ca21a975ef0666ad"
 
-"@types/lodash@^4.14.64":
-  version "4.14.74"
-  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.74.tgz#ac3bd8db988e7f7038e5d22bd76a7ba13f876168"
+"@types/lodash@^4.14.146":
+  version "4.14.168"
+  resolved "https://registry.yarnpkg.com/@types/lodash/-/lodash-4.14.168.tgz#fe24632e79b7ade3f132891afff86caa5e5ce008"
 
 "@types/mocha@^2.2.41":
   version "2.2.43"
@@ -556,15 +556,15 @@ glob@7.1.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/graceful-readlink/-/graceful-readlink-1.0.1.tgz#4cafad76bc62f02fa039b2f94e9a3dd3a391a725"
 
-graphlabs.core.graphs@^0.0.30:
-  version "0.0.30"
-  resolved "https://registry.yarnpkg.com/graphlabs.core.graphs/-/graphlabs.core.graphs-0.0.30.tgz#fc0b504c34263e91e3340b834bb8aa0decb77fb0"
+graphlabs.core.graphs@^0.1.9:
+  version "0.1.9"
+  resolved "https://registry.yarnpkg.com/graphlabs.core.graphs/-/graphlabs.core.graphs-0.1.9.tgz#ffd3eb2c31e3293fc4c0063ac544b30033e7eac6"
   dependencies:
-    "@types/lodash" "^4.14.64"
+    "@types/lodash" "^4.14.146"
     immutable "^3.8.1"
-    lodash "^4.13.1"
-    ts-md5 "^1.2.0"
-    typescript "^2.8.3"
+    lodash "^4.17.15"
+    ts-md5 "^1.2.7"
+    typescript "^3.7.2"
 
 growl@1.9.2:
   version "1.9.2"
@@ -658,9 +658,9 @@ lodash.keys@^3.0.0:
     lodash.isarguments "^3.0.0"
     lodash.isarray "^3.0.0"
 
-lodash@^4.13.1:
-  version "4.17.15"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+lodash@^4.17.15:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 loose-envify@^1.1.0, loose-envify@^1.4.0:
   version "1.4.0"
@@ -789,9 +789,9 @@ supports-color@^4.0.0:
   dependencies:
     has-flag "^2.0.0"
 
-ts-md5@^1.2.0:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/ts-md5/-/ts-md5-1.2.2.tgz#d176bcb9daca485a0fd29e6092bd4f6d658cf727"
+ts-md5@^1.2.7:
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/ts-md5/-/ts-md5-1.2.7.tgz#b76471fc2fd38f0502441f6c3b9494ed04537401"
 
 ts-node@^3.2.0:
   version "3.3.0"
@@ -819,13 +819,9 @@ type-detect@^4.0.0:
   version "4.0.3"
   resolved "https://registry.yarnpkg.com/type-detect/-/type-detect-4.0.3.tgz#0e3f2670b44099b0b46c284d136a7ef49c74c2ea"
 
-typescript@^2.4.2:
-  version "2.5.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.5.2.tgz#038a95f7d9bbb420b1bf35ba31d4c5c1dd3ffe34"
-
-typescript@^2.8.3:
-  version "2.9.2"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.9.2.tgz#1cbf61d05d6b96269244eb6a3bce4bd914e0f00c"
+typescript@^3.7.0, typescript@^3.7.2:
+  version "3.9.9"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.9.tgz#e69905c54bc0681d0518bd4d587cc6f2d0b1a674"
 
 user-home@^1.1.1:
   version "1.1.1"