Update dependency semver to v7 [SECURITY]

Author: renovate[bot]

package.json

@@ -14,7 +14,7 @@
   },
   "dependencies": {
     "probot": "^7.0.1",
-    "semver": "5.6.0"
+    "semver": "7.5.2"
   },
   "devDependencies": {
     "eslint": "^5.3.0",

yarn.lock

@@ -2636,6 +2636,13 @@ lru-cache@^4.0.1:
     pseudomap "^1.0.2"
     yallist "^2.1.2"
 
+lru-cache@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-6.0.0.tgz#6d6fe6570ebd96aaf90fcad1dafa3b2566db3a94"
+  integrity sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==
+  dependencies:
+    yallist "^4.0.0"
+
 [email protected]:
   version "1.0.11"
   resolved "https://registry.yarnpkg.com/makeerror/-/makeerror-1.0.11.tgz#e01a5c9109f2af79660e4e8b9587790184f5a96c"
@@ -3630,9 +3637,12 @@ sax@^1.2.4:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
 
-[email protected]:
-  version "5.6.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.6.0.tgz#7e74256fbaa49c75aa7c7a205cc22799cac80004"
+[email protected]:
+  version "7.5.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.5.2.tgz#5b851e66d1be07c1cdaf37dfc856f543325a2beb"
+  integrity sha512-SoftuTROv/cRjCze/scjGyiDtcUyxw1rgYQSZY7XTmtR5hX+dm76iDbTH8TkLPHCQmlbQVSSbNZCPM2hb0knnQ==
+  dependencies:
+    lru-cache "^6.0.0"
 
 [email protected]:
   version "0.16.2"
@@ -4353,6 +4363,11 @@ yallist@^3.0.0, yallist@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.0.2.tgz#8452b4bb7e83c7c188d8041c1a837c773d6d8bb9"
 
+yallist@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/yallist/-/yallist-4.0.0.tgz#9bb92790d9c0effec63be73519e11a35019a3a72"
+  integrity sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==
+
 yargs-parser@^4.2.0:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-4.2.1.tgz#29cceac0dc4f03c6c87b4a9f217dd18c9f74871c"