I am playing with an new typescript react app. (created with CRA) I use npm@5.6.0 on on PC and @6.4.1 on the other. The newer Version installs dependencies with an older version than the newer one. The newer one also shows 63 low severity vulnerabilities after install.
installed with 5.6.0
"@babel/code-frame": "7.0.0",
"@babel/generator": "7.4.0",
"@babel/helpers": "7.4.2",
"@babel/parser": "7.4.2",
"@babel/template": "7.4.0",
"@babel/traverse": "7.4.0",
"@babel/types": "7.4.0",
"convert-source-map": "1.6.0",
"debug": "4.1.1",
"json5": "2.1.0",
"lodash": "4.17.11",
"resolve": "1.10.0",
"semver": "5.6.0",
"source-map": "0.5.7"
installed with 6.4.1
"@babel/code-frame": "^7.0.0",
"@babel/generator": "^7.2.2",
"@babel/helpers": "^7.2.0",
"@babel/parser": "^7.2.2",
"@babel/template": "^7.2.2",
"@babel/traverse": "^7.2.2",
"@babel/types": "^7.2.2",
"convert-source-map": "^1.1.0",
"debug": "^4.1.0",
"json5": "^2.1.0",
"lodash": "^4.17.10",
"resolve": "^1.3.2",
"semver": "^5.4.1",
"source-map": "^0.5.0"