Bump codecov from 3.6.5 to 3.7.1 (#107)

diff --git a/package-lock.json b/package-lock.json
index bc7642d..d77e7ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -304,9 +304,9 @@
             "dev": true
         },
         "@tootallnate/once": {
-            "version": "1.0.0",
-            "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.0.0.tgz",
-            "integrity": "sha512-KYyTT/T6ALPkIRd2Ge080X/BsXvy9O0hcWTtMWkPvwAwF99+vn6Dv4GzrFT/Nn1LePr+FFDbRXXlqmsy9lw2zA==",
+            "version": "1.1.2",
+            "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
+            "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw==",
             "dev": true
         },
         "@types/color-name": {
@@ -327,9 +327,9 @@
             "dev": true
         },
         "agent-base": {
-            "version": "6.0.0",
-            "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.0.tgz",
-            "integrity": "sha512-j1Q7cSCqN+AwrmDd+pzgqc0/NpC655x2bUf5ZjRIO77DcNBFmh+OgRNzF6OKdCC9RSCb19fGd99+bhXFdkRNqw==",
+            "version": "6.0.2",
+            "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
+            "integrity": "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ==",
             "dev": true,
             "requires": {
                 "debug": "4"
@@ -629,9 +629,9 @@
             "integrity": "sha1-G39Ln1kfHo+DZwQBYANFoCiHQ18="
         },
         "codecov": {
-            "version": "3.6.5",
-            "resolved": "https://registry.npmjs.org/codecov/-/codecov-3.6.5.tgz",
-            "integrity": "sha512-v48WuDMUug6JXwmmfsMzhCHRnhUf8O3duqXvltaYJKrO1OekZWpB/eH6iIoaxMl8Qli0+u3OxptdsBOYiD7VAQ==",
+            "version": "3.7.1",
+            "resolved": "https://registry.npmjs.org/codecov/-/codecov-3.7.1.tgz",
+            "integrity": "sha512-JHWxyPTkMLLJn9SmKJnwAnvY09kg2Os2+Ux+GG7LwZ9g8gzDDISpIN5wAsH1UBaafA/yGcd3KofMaorE8qd6Lw==",
             "dev": true,
             "requires": {
                 "argv": "0.0.2",