Update CHANGES.md for edge-19.1.4 release (linkerd#2186)

Update CHANGES.md for edge-19.1.4 release

Signed-off-by: Alejandro Pedraza <alejandro@buoyant.io>

Update CHANGES.md for edge-19.1.3 release (linkerd#2148)

* Update CHANGES.md for edge-19.1.3 release

Add release notes for edge-19.1.2 release (linkerd#2096)

Depends on linkerd#2037, linkerd#2038, linkerd#2063, linkerd#2066, linkerd#2087, linkerd#2089, linkerd#2105

Signed-off-by: Andrew Seigner <siggy@buoyant.io>

Update CHANGES.md for the edge-19.1.1 release (linkerd#2065)

* Update CHANGES.md for the edge-19.1.1 release
* Tweak wording / punctuation
* Update wording for proxy fixes

Signed-off-by: Kevin Lingerfelt <kl@buoyant.io>

Add release notes for edge-18.12.4 release (linkerd#2019)

Signed-off-by: Kevin Lingerfelt <kl@buoyant.io>

Update CHANGES.md for the edge-18.12.3 release (linkerd#1988)

* Update CHANGES.md for the edge-18.12.3 release

Add release notes for stable-2.1.0 release (linkerd#1957)

Signed-off-by: Kevin Lingerfelt <kl@buoyant.io>

Add release notes for edge-18.12.2 release (linkerd#1955)

Signed-off-by: Kevin Lingerfelt <kl@buoyant.io>

Update CHANGES.md for the edge-18.12.1 release (linkerd#1938)

* Update CHANGES.md for the edge-18.12.1 release

Release notes for edge-18.11.3 (linkerd#1885)

Signed-off-by: Andrew Seigner <siggy@buoyant.io>