v4.2.2

Healpix v4.2.2

Diff since v4.2.1

• Fix bug #112

Merged pull requests:

• Fix doc name, specify throws in two functions (#110) (@robertkleffner)
• Fix wrong field name (#113) (@ziotom78)

Closed issues:

• Bug in queryDiscRing ? (#87)
• type-dependent bug in ang2pixRing (#93)
• bug in pix2ringpos for southern cap (#108)