Update dependency lerna to ^3.20.2

Author: renovate-bot

package.json

@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "husky": "^1.3.1",
-    "lerna": "^3.16.4",
+    "lerna": "^3.20.2",
     "lint-staged": "^8.2.1",
     "yarn": "^1.17.3"
   },

yarn.lock

@@ -9962,7 +9962,7 @@ left-pad@^1.3.0:
   resolved "https://registry.yarnpkg.com/left-pad/-/left-pad-1.3.0.tgz#5b8a3a7765dfe001261dde915589e782f8c94d1e"
   integrity sha512-XI5MPzVNApjAyhQzphX8BkmKsKUxD4LdyK24iZeQGinBN9yTQT3bFlCBy/aVx2HrNcqQGsdot8ghrjyrvMCoEA==
 
-lerna@^3.16.4:
+lerna@^3.20.2:
   version "3.20.2"
   resolved "https://registry.yarnpkg.com/lerna/-/lerna-3.20.2.tgz#abf84e73055fe84ee21b46e64baf37b496c24864"
   integrity sha512-bjdL7hPLpU3Y8CBnw/1ys3ynQMUjiK6l9iDWnEGwFtDy48Xh5JboR9ZJwmKGCz9A/sarVVIGwf1tlRNKUG9etA==
@@ -11184,22 +11184,6 @@ node-notifier@^5.2.1:
     shellwords "^0.1.1"
     which "^1.3.0"
 
-node-pre-gyp@*:
-  version "0.14.0"
-  resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.14.0.tgz#9a0596533b877289bcad4e143982ca3d904ddc83"
-  integrity sha512-+CvDC7ZttU/sSt9rFjix/P05iS43qHCOOGzcr3Ry99bXG7VX953+vFyEuph/tfqoYu8dttBkE86JSKBO2OzcxA==
-  dependencies:
-    detect-libc "^1.0.2"
-    mkdirp "^0.5.1"
-    needle "^2.2.1"
-    nopt "^4.0.1"
-    npm-packlist "^1.1.6"
-    npmlog "^4.0.2"
-    rc "^1.2.7"
-    rimraf "^2.6.1"
-    semver "^5.3.0"
-    tar "^4.4.2"
-
 node-pre-gyp@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/node-pre-gyp/-/node-pre-gyp-0.11.0.tgz#db1f33215272f692cd38f03238e3e9b47c5dd054"
@@ -14938,7 +14922,7 @@ tar@^2.0.0:
     fstream "^1.0.12"
     inherits "2"
 
-tar@^4, tar@^4.4.10, tar@^4.4.12, tar@^4.4.2, tar@^4.4.8:
+tar@^4, tar@^4.4.10, tar@^4.4.12, tar@^4.4.8:
   version "4.4.13"
   resolved "https://registry.yarnpkg.com/tar/-/tar-4.4.13.tgz#43b364bc52888d555298637b10d60790254ab525"
   integrity sha512-w2VwSrBoHa5BsSyH+KxEqeQBAllHhccyMFVHtGtdMpF4W7IRWfZjFiQceJPChOeTsSDVUpER2T8FA93pr0L+QA==