Remove unused dependency (#59)

Trimming some unused dependencies

Author: lorcan

package.json

@@ -60,7 +60,6 @@
     "rollup-plugin-commonjs": "^10.0.1",
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-shebang": "^0.1.5",
     "rollup-plugin-sourcemaps": "^0.4.2",
     "rollup-plugin-typescript2": "^0.22.1",
     "semantic-release": "^15.13.19",

yarn.lock

@@ -6343,11 +6343,6 @@ rollup-plugin-node-resolve@^5.2.0:
     resolve "^1.11.1"
     rollup-pluginutils "^2.8.1"
 
-rollup-plugin-shebang@^0.1.5:
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/rollup-plugin-shebang/-/rollup-plugin-shebang-0.1.5.tgz#a15c9fed2d6c369f668a66a311b99c2023a6e0e4"
-  integrity sha512-7rtj//+Y0b4ha71PNCIk1GJjjcyZUZtPZe4l4YguUsrZrp5ukc/tbw5N1CTglbLojICrL/oJT9xDnjKQrXX1ZQ==
-
 rollup-plugin-sourcemaps@^0.4.2:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/rollup-plugin-sourcemaps/-/rollup-plugin-sourcemaps-0.4.2.tgz#62125aa94087aadf7b83ef4dfaf629b473135e87"