chore(deps): update dependency rollup to v0.60.1

[renovate]

This Pull Request updates dependency rollup from v0.59.4 to v0.60.1

Release Notes

v0.60.1

Compare Source
2018-06-07

• Fix plugin regressions (#​2246)
• Avoid conflicts for large numbers of variables (#​2244)

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v0.60.0

Compare Source
2018-06-06

• New plugin hooks: transformChunk, buildStart, buildEnd; extended plugin context with warn, error, resolveId, isExternal, emitAsset, setAssetSource and getAssetFileName available to any hook (#​2208)
• [BREAKING] Deprecate the legacy option and thus IE8 support (#​2141)
• Detect more known extensions and load .mjs without extension (#​2211)
• Add compact output mode (#​2151)
• Significantly improve sourcemap generation performance (#​2228)
• Enable naming SystemJS modules (#​2028)
• Do not use alternate screen if clearScreen is set in watch mode (#​2125)
• Allow object input form for code-splitting in watch mode (#​2217)
• Track reassignments of methods of exports from outside (#​2240)
• Preserve id of default exported functions and classes (#​2234)
• Add semicolons after default exports (#​2209)
• Fix build problems on Windows (#​2232)
• Display install size in readme (#​2196)
• Improve preserve modules test (#​2236)

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