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composer.json 中 "hisune/echarts-php": "^1.0" 含义，以及里面的^ 含义
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The ^ operator behaves very similarly but it sticks closer to semantic versioning, and will always allow non-breaking updates. For example ^1.2.3 is equivalent to >=1.2.3 <2.0.0 as none of the releases until 2.0 should break backwards compatibility. For pre-1.0 versions it also acts with safety in mind and treats ^0.3 as >=0.3.0 <0.4.0.
This is the recommended operator for maximum interoperability when writing library code.
Example: ^1.2.3
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