v0.9.4

Wavelets v0.9.4

Diff since v0.9.3

Closed issues:

• tag version with SpecialFunctions 1 (#67)
• Release 0.9.3 (#68)
• wplotim is destructive (#71)
• where is idwt defined? (#74)

Merged pull requests:

• fix #71 wplotim modified input (#72) (@JeffFessler)
• Add references to other packages (#76) (@gummif)
• Update compat for DSP and SpecialFunctions (#77) (@halleysfifthinc)