chore(deps): update dependency semantic-release to v15.1.8 (#208)

Author: renovate[bot]

package.json

@@ -56,7 +56,7 @@
     "rollup-plugin-node-resolve": "3.3.0",
     "rollup-plugin-replace": "2.0.0",
     "rollup-plugin-uglify": "3.0.0",
-    "semantic-release": "15.1.7",
+    "semantic-release": "15.1.8",
     "typescript": "2.8.3"
   },
   "keywords": [

yarn.lock

@@ -1677,9 +1677,9 @@ encoding@^0.1.11:
   dependencies:
     iconv-lite "~0.4.13"
 
-env-ci@^1.0.0:
-  version "1.7.1"
-  resolved "https://registry.yarnpkg.com/env-ci/-/env-ci-1.7.1.tgz#ba8c59d5d9aea2f8b5c57ad637ebac34fcd0428f"
+env-ci@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/env-ci/-/env-ci-2.0.0.tgz#f62983d73740140e0a9ed78c9704473a6e163860"
   dependencies:
     execa "^0.10.0"
     java-properties "^0.2.9"
@@ -4392,9 +4392,9 @@ sax@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
 
-[email protected].7:
-  version "15.1.7"
-  resolved "https://registry.yarnpkg.com/semantic-release/-/semantic-release-15.1.7.tgz#b29eef1b9443f75addab7c2e353338b72b9b628d"
+[email protected].8:
+  version "15.1.8"
+  resolved "https://registry.yarnpkg.com/semantic-release/-/semantic-release-15.1.8.tgz#5b659650f9d9a6b35252fb05bb1e08d728713bc5"
   dependencies:
     "@semantic-release/commit-analyzer" "^5.0.0"
     "@semantic-release/error" "^2.2.0"
@@ -4405,7 +4405,7 @@ [email protected]:
     chalk "^2.3.0"
     cosmiconfig "^4.0.0"
     debug "^3.1.0"
-    env-ci "^1.0.0"
+    env-ci "^2.0.0"
     execa "^0.10.0"
     get-stream "^3.0.0"
     git-log-parser "^1.2.0"