Sourced from svgo's releases.

1.1.1 / 17.09.2018

• Fixed crash in SVGO.optimize() when ‘info’ is absent.
• Removed extra space after cleanupListOfValues plugin.

1.1.0 / 16.09.2018

• Fixed collapseGroups plugin removing property with a child having inherit value.
• version attribute value is not more being rounded.
• Fixed jsAPI clone method with respect to the introduced CSS classes.
• Fixed scaling strokes with vector-effect="non-scaling-stroke" (by alexjlockwood).
• Fixed passing properties from groups in collapseGroups plugin if child have a filter (by stristr).
• Fixed arc path commands parsing without separators after flags, effectively producing a JS error.
• Fixed viewBox separators parsing.
• Fixed removeNonInheritableGroupAttrs plugin to work as intended.
• Fixed removing path segments without length in presence of stroke-linecap.
• Fixed removeUnknownsAndDefaults plugin removing attributes from elements with id.
• Fixed converting to large arcs from nearly straight lines curves.
• Fixed collapseGroups plugin affecting <switch> and its subgroups.
• Fixed convertTransform plugin converting to rotate() with wrong sign in some case.
• Fixed cleanupListOfValues plugin not preserving non-numeric values.
• Fixed !important being passed to attributes in convertStyleToAttrs plugin.
• Added option keepImportant to convertStyleToAttrs plugin to preserve styles with !important.
• removeHiddenElems plugin now also removes elements with visibility="hidden" attribute (by mikolaj92).
• Added forceAbsolutePath option to convertPathData plugin to always use absolute coordinates (by cool).
• Added keepRoleAttr for removeUnknownsAndDefaults plugin to preserve role- attributes (by himedlooff).
• Added xmlns order option in sortAttrs plugin (by hellatan).
• Added an option to prefixIds plugin to pass prefix as false or as a function that returns false (by vzaidman).
• prefixIds plugin now adds prefix to every class (by vzaidman).
• Updated and improved docs a bit (multiple authors).

1.0.5 / 26.02.2018

Fixed issue with prefixIDs plugin not replacing url() values correctly (by harrisjose).

1.0.4 / 30.01.2018

• Fixed bug with removing groups that are direct child of <switch>.
• Fixed bug with shorthand path points counting (thanks alexjlockwood for noticing).
• Fixed crash on parsing invalid transform, e.g. without close parenthesis.

1.0.3 / 08.11.2017

• Fixed removeViewBox plugin to check for zero start coordinates.
• Removed extra info from STDOUT when it set to output.

1.0.2 / 03.11.2017

• Fixed a couple of errors related to inlineStyles plugin.
• Updated some lost details in documentation to reflect v1.0 changes.

1.0.1 / 31.10.2017

• Fixed error “Object.defineProperty called on non-object” in images with <foreignObject/>.

1.0.0 / 30.10.2017

• SVGO now requires Node 4 or higher.

... (truncated)

Sourced from svgo's changelog.

[ > ] 1.1.1 / 17.09.2018

• Fixed crash in SVGO.optimize() when ‘info’ is absent.
• Removed extra space after cleanupListOfValues plugin.

[ > ] 1.1.0 / 16.09.2018

• Fixed collapseGroups plugin removing property with a child having inherit value.
• version attribute value is not more being rounded.
• Fixed jsAPI clone method with respect to the introduced CSS classes.
• Fixed scaling strokes with vector-effect="non-scaling-stroke" (by alexjlockwood).
• Fixed passing properties from groups in collapseGroups plugin if child have a filter (by stristr).
• Fixed arc path commands parsing without separators after flags, effectively producing a JS error.
• Fixed viewBox separators parsing.
• Fixed removeNonInheritableGroupAttrs plugin to work as intended.
• Fixed removing path segments without length in presence of stroke-linecap.
• Fixed removeUnknownsAndDefaults plugin removing attributes from elements with id.
• Fixed converting to large arcs from nearly straight lines curves.
• Fixed collapseGroups plugin affecting <switch> and its subgroups.
• Fixed convertTransform plugin converting to rotate() with wrong sign in some case.
• Fixed cleanupListOfValues plugin not preserving non-numeric values.
• Fixed !important being passed to attributes in convertStyleToAttrs plugin.
• Added option keepImportant to convertStyleToAttrs plugin to preserve styles with !important.
• removeHiddenElems plugin now also removes elements with visibility="hidden" attribute (by mikolaj92).
• Added forceAbsolutePath option to convertPathData plugin to always use absolute coordinates (by cool).
• Added keepRoleAttr for removeUnknownsAndDefaults plugin to preserve role- attributes (by himedlooff).
• Added xmlns order option in sortAttrs plugin (by hellatan).
• Added an option to prefixIds plugin to pass prefix as false or as a function that returns false (by vzaidman).
• prefixIds plugin now adds prefix to every class (by vzaidman).
• Updated and improved docs a bit (multiple authors).

[ > ] 1.0.5 / 26.02.2018

• Fixed issue with prefixIDs plugin not replacing url() values correctly (by harrisjose).

[ > ] 1.0.4 / 30.01.2018

• Fixed bug with removing groups that are direct child of "".
• Fixed bug with shorthand path points counting (thanks alexjlockwood for noticing).
• Fixed crash on parsing invalid transform, e.g. without close parenthesis.

[ > ] 1.0.3 / 08.11.2017

• Fixed removeViewBox plugin to check for zero start coordinates.
• Removed extra info from STDOUT when it set to output.

[ > ] 1.0.2 / 03.11.2017

• Fixed a couple of errors related to inlineStyles plugin.
• Updated some lost details in documentation to reflect v1.0 changes.

[ > ] 1.0.1 / 31.10.2017

• Fixed error “Object.defineProperty called on non-object” in images with <foreignObject/>.

[ > ] 1.0.0 / 30.10.2017

• SVGO now requires Node 4 or higher.

... (truncated)

• e68d24f v1.1.1
• dfcc145 Fix crash when ‘info’ is absent
• ed75e56 Fix and update cleanupListOfValues tests
• e7bdce6 v1.1.0
• 37d4ca8 Fix cleanupListOfValues to preserve non-numeric values
• eeeb67d Fix convertTransform wrong rotate sign
• 7a07b84 Fix collapseGroups plugin affecting switch and subgroups
• 5800635 Fix converting to large arcs from nearly straight lines curves
• a4fb3a4 Prevent removeUnknownsAndDefaults removing attributes from elements with id
• 831f95f Fix empty path segments removing with stroke-linecap
• Additional commits viewable in compare view

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